{"componentChunkName":"component---src-components-article-page-article-page-gatsby-container-tsx","path":"/articles/cycle-a-z/hair-and-the-menstrual-cycle","result":{"data":{"articleNode":{"id":"4h3ehPDRdmeMW2c4Ems682","title":"Hair and the menstrual cycle","subtitle":null,"seoMetaTitle":"Hair and the menstrual cycle","seoMetaDescription":"Your skin and scalp change in response to hormonal variations occurring throughout your cycle. Some people report more bad hair days around their period.","openGraphTitle":"Hair and the menstrual cycle","openGraphDescription":"Your skin and scalp change in response to hormonal variations occurring throughout your cycle. Some people report more bad hair days around their period.","slug":"cycle-a-z/hair-and-the-menstrual-cycle","artCredits":"Photography by Franz Grünewald and Anna Shvets. Art direction by Marta Pucci.","publishDate":"2018-02-28T00:00+01:00","updatedAt":"2024-07-31T10:21:25.426Z","createdAt":"2018-02-28T14:05:51.270Z","locale":"en","authors":[{"id":"7L3A5TIjDic8sECACmIYae","name":"Nicole Telfer","headline":"Science writer","slug":"nicole-telfer","twitter":null,"locale":"en","profileImage":{"id":"3jZ7J2VYPeAgOsYqwMOoom","description":"","file":{"contentType":"image/png","url":"//images.ctfassets.net/juauvlea4rbf/3jZ7J2VYPeAgOsYqwMOoom/8b90e36b1e8ecf1a5b86f295634cafdd/Nicole_Telfer.png"},"gatsbyImageData":{"images":{"sources":[{"srcSet":"https://images.ctfassets.net/juauvlea4rbf/3jZ7J2VYPeAgOsYqwMOoom/8b90e36b1e8ecf1a5b86f295634cafdd/Nicole_Telfer.png?w=225&h=225&q=50&fm=webp 225w,\nhttps://images.ctfassets.net/juauvlea4rbf/3jZ7J2VYPeAgOsYqwMOoom/8b90e36b1e8ecf1a5b86f295634cafdd/Nicole_Telfer.png?w=450&h=450&q=50&fm=webp 450w,\nhttps://images.ctfassets.net/juauvlea4rbf/3jZ7J2VYPeAgOsYqwMOoom/8b90e36b1e8ecf1a5b86f295634cafdd/Nicole_Telfer.png?w=900&h=900&q=50&fm=webp 900w","sizes":"(min-width: 900px) 900px, 100vw","type":"image/webp"}],"fallback":{"src":"https://images.ctfassets.net/juauvlea4rbf/3jZ7J2VYPeAgOsYqwMOoom/8b90e36b1e8ecf1a5b86f295634cafdd/Nicole_Telfer.png?w=900&h=900&q=50&fm=png","srcSet":"https://images.ctfassets.net/juauvlea4rbf/3jZ7J2VYPeAgOsYqwMOoom/8b90e36b1e8ecf1a5b86f295634cafdd/Nicole_Telfer.png?w=225&h=225&q=50&fm=png 225w,\nhttps://images.ctfassets.net/juauvlea4rbf/3jZ7J2VYPeAgOsYqwMOoom/8b90e36b1e8ecf1a5b86f295634cafdd/Nicole_Telfer.png?w=450&h=450&q=50&fm=png 450w,\nhttps://images.ctfassets.net/juauvlea4rbf/3jZ7J2VYPeAgOsYqwMOoom/8b90e36b1e8ecf1a5b86f295634cafdd/Nicole_Telfer.png?w=900&h=900&q=50&fm=png 900w","sizes":"(min-width: 900px) 900px, 100vw"}},"layout":"constrained","backgroundColor":"#080808","width":900,"height":900}}}],"reviewers":null,"editors":null,"featuredImage":{"description":"Photographs of 4 different types of hair: straight and blonde, black and very curly, short orange, brown and wavy","file":{"contentType":"image/jpeg","url":"//images.ctfassets.net/juauvlea4rbf/Kl1dDLcVkiuOEkWeSg0mk/996111ac3c07bf64c4500594ccc0fef1/Contentful.jpg"},"gatsbyImageData":{"images":{"sources":[{"srcSet":"https://images.ctfassets.net/juauvlea4rbf/Kl1dDLcVkiuOEkWeSg0mk/996111ac3c07bf64c4500594ccc0fef1/Contentful.jpg?w=240&h=120&q=50&fm=webp 240w,\nhttps://images.ctfassets.net/juauvlea4rbf/Kl1dDLcVkiuOEkWeSg0mk/996111ac3c07bf64c4500594ccc0fef1/Contentful.jpg?w=480&h=240&q=50&fm=webp 480w,\nhttps://images.ctfassets.net/juauvlea4rbf/Kl1dDLcVkiuOEkWeSg0mk/996111ac3c07bf64c4500594ccc0fef1/Contentful.jpg?w=960&h=480&q=50&fm=webp 960w,\nhttps://images.ctfassets.net/juauvlea4rbf/Kl1dDLcVkiuOEkWeSg0mk/996111ac3c07bf64c4500594ccc0fef1/Contentful.jpg?w=1920&h=960&q=50&fm=webp 1920w","sizes":"(min-width: 960px) 960px, 100vw","type":"image/webp"}]},"layout":"constrained","backgroundColor":"#b8b8b8","width":960,"height":480}},"openGraphImage":{"description":"Photographs of 4 different types of hair: straight and blonde, black and very curly, short orange, brown and wavy","file":{"url":"//images.ctfassets.net/juauvlea4rbf/exbm3zx9wIpBIHQD0hIDf/9b11b82c3fdebb068265acb36182d66a/FB.jpg"}},"sectionDivider":null,"featuredVideoURL":null,"category":{"id":"1qIIUsSZxWn8P5Eag2JI8Q","slug":"skin-and-hair","title":"Skin & Hair","color":null,"description":{"description":"Articles about Skin and Hair."},"parentCategory":{"title":"Menstrual Cycle","slug":"menstrual-cycle"},"locale":"en"},"body":{"body":"## Top things to know:\n- Some people report more bad hair days around their period\n- The production of oil which exits from the same route as your hair follicle is influenced by your hormones\n- Your hair may change during different life stages, like pregnancy and menopause\n\n## How hair changes throughout the menstrual cycle\n\nYour [skin](https://helloclue.com/articles/cycle-a-z/skin-and-the-cycle-how-hormones-affect-your-skin \"Skin and the cycle\") and scalp change in response to hormonal variations occurring throughout your cycle. Some people report more bad hair days around their period (1). \n\nMany of the changes you may be associating with your hair throughout your cycle are due to the changes in [oil production](https://helloclue.com/articles/cycle-a-z/skin-and-the-cycle-how-hormones-affect-your-skin \"Skin and the cycle\") from your sebaceous glands. Since *sebum* (oil produced by the sebaceous gland) and the hair follicle exit from the same opening in the skin, the hair and skin surrounding may be coated in sebum.\n\nSebum production is influenced by your hormones, particularly androgens (like testosterone) (2,3). \n\nSebum production often ramps up greatly during puberty, often being produced at high amounts between the ages of 15 to 35, as assessed on the skin (4). Estrogen also influences sebum production, particularly by suppressing levels of sebum production and sebaceous gland activation, especially at high doses (2,3,5-7). In a study of sebum production on the skin, people with oily-type skin noticed an increase in sebum production during their premenstrual and menstrual period, with the lowest amount of sebum production during the second week of their cycle (8).\n\nOne [study](https://www.ncbi.nlm.nih.gov/pubmed/17163928 \"'Bad hair days', scalp sebum excretion and the menstrual cycle.\") had an interesting finding: even if more bad hair days were registered around the time of menstruation, they did not correlate with increases in scalp sebum levels (1). There was not a clear explanation for the bad hair days—perhaps it’s due to a difference in participants’ personal perception of their hair (1). Is the change on your head or in your head? \n\nSome hormonal contraceptive medications (like chlormadinone acetate, a synthetic progesterone which provides anti-androgen activity) may also affect hair and skin quality (9). In [one study of people taking these medications](https://www.ncbi.nlm.nih.gov/pubmed/22404700 \"Effects of an oral contraceptive containing chlormadinone acetate and ethinylestradiol on hair and skin quality in women wishing to use hormonal contraception.\"), participants had decreased sebum production and improved perceived hair quality (9). \n## Understanding hair anatomy\nIf you’re curious about changes to your hair and suspect they might be linked to hormonal changes, it’s helpful to understand the anatomy of hair.\n\nThere are many different types of hair that grow on your body, differing in texture, length, type, and density. Think of the difference between the hair on your head versus the fine hair on your torso. The only areas of our skin without hair growth are on the palms of hands, the soles of feet, and lips (10).\n\nEach individual hair grows out of *hair follicles*. The part of the hair that you can see exiting your skin is called the *hair shaft*.\n\nEach hair follicle is part of a *pilosebaceous unit* within the skin, which consists of a hair follicle, a sebaceous gland, and a small muscle called the *arrector pili*. The sebaceous gland produces an oil called *sebum*, which exits onto the skin through the same route of the hair.\n\nThe arrector pili is a very small muscle that is attached to each individual hair follicle. When you are cold or scared, you may notice that your skin turns bumpy and the hairs on your body stand on end (goose bumps)—you can thank this tiny muscle for this. \nSome hairs, like the hairs on your head, can be in their active growing phase for many years, while other hairs, like the ones on your eyebrows, may only grow for a couple of months before they are shed (11).\n\nThere are three phases of a hair’s life cycle. The growing phase (*anagen phase*), the end of the active growth of the hair (*catagen phase*), and the final resting phase where the hair is dead and will eventually fall out (*telogen phase*) (10,11). Losing hairs every day is part of the natural life cycle of the hair—losing between 50 to 150 scalp hairs per day is normal (11). \n## Hair changes in pregnancy, menopause, and PCOS\nDuring pregnancy, some people may notice increased hair thickness. This is because the number of hairs shed daily is reduced. Pregnancy influences hair follicles to stay within their growth phase (anagen phase) longer than they would normally (12).\n\nAfter delivery, it is normal to notice increased amounts of hair loss, as all the hairs that stayed in prolonged anagen phase change over together into catagen phase (11,12). This is considered common and should not be any reason to panic. Even if it feels like you may be losing an abnormal amount of hair, it is just an accumulation of all the hair you would have normally lost during the time you were pregnant (12).\n\nOther changes that can occur to your hair during pregnancy are an increase in hair fiber diameter—i.e. hair thickness—as it grows from the scalp, in comparison to women who were not pregnant (13). This change in hair diameter may also contribute to feelings of increased hair thickness during pregnancy.\n\nHair growth may also change around the time of menopause, as sex hormone levels change in availability. Some people may notice they develop female pattern hair loss, where their hairline may stay the same, but hair follicle density decreases around the top and sides of the head (12). Facial hirsutism (abnormal hair growth) is also common after menopause, with around half of post-menopausal women reporting excessive facial hair growth (12,14). \n\nAnother very common cause of hirsutism is *polycystic ovarian syndrome* (PCOS), in which androgen levels are abnormally high. In both PCOS and after menopause, the levels of androgens are relatively higher. This excess in androgens promotes hair to grow thicker, darker, and increase sebum production (10,12).\n\n## What’s average and healthy\nEvery person’s hair is different, just as every body is different. Color, length, thickness, curl—there is no such thing as average or normal hair—only what is “average and normal” for you. Hair is very different from person to person. \n\nSome researchers have tried to assess the speed at which hair grows, and they found that scalp hair grows about 15 cm (6 inches) a year, or 1.25 cm (0.5 inches) per month (15). \n\nThere are many other culprits other than your hormones that can account for a bad hair day. These include environmental factors (smog, smoke, exposure to UV light, saltwater), hair care products, perming, bleaching, hair dyeing, excessive use of hair products, infrequent washing, rough brushing, and excessive heat styling (1,16). \n\nUse [Clue](https://app.adjust.com/f7a8td \"Download Clue\") to track how your hair changes throughout your cycle. You can track your hair daily as “Good”, “Bad”, “Oily”, or “Dry”. If you want to track more, you can create a custom tag. \n\nMany Clue users have given us feedback about our icons, asking for them to be more inclusive of all hair types. We hear you! Please stay tuned—we have new hair icons on the way. \n"},"bodyRichText":{"raw":"{\"data\":{},\"content\":[{\"data\":{},\"content\":[{\"data\":{},\"marks\":[],\"value\":\"Top things to know:\",\"nodeType\":\"text\"}],\"nodeType\":\"heading-2\"},{\"data\":{},\"content\":[{\"data\":{},\"content\":[{\"data\":{},\"content\":[{\"data\":{},\"marks\":[],\"value\":\"Some people report more \",\"nodeType\":\"text\"},{\"data\":{},\"marks\":[{\"type\":\"italic\"}],\"value\":\"bad hair days\",\"nodeType\":\"text\"},{\"data\":{},\"marks\":[],\"value\":\" around their period\",\"nodeType\":\"text\"}],\"nodeType\":\"paragraph\"}],\"nodeType\":\"list-item\"},{\"data\":{},\"content\":[{\"data\":{},\"content\":[{\"data\":{},\"marks\":[],\"value\":\"The production of oil which exits from the same route as your hair follicle is influenced by your hormones\",\"nodeType\":\"text\"}],\"nodeType\":\"paragraph\"}],\"nodeType\":\"list-item\"},{\"data\":{},\"content\":[{\"data\":{},\"content\":[{\"data\":{},\"marks\":[],\"value\":\"Your hair may change during different life stages, like pregnancy and menopause\",\"nodeType\":\"text\"}],\"nodeType\":\"paragraph\"}],\"nodeType\":\"list-item\"}],\"nodeType\":\"unordered-list\"},{\"data\":{\"target\":{\"sys\":{\"id\":\"44KqIALQXFaMrpG77kwnlK\",\"type\":\"Link\",\"linkType\":\"Entry\"}}},\"content\":[],\"nodeType\":\"embedded-entry-block\"},{\"data\":{},\"content\":[{\"data\":{},\"marks\":[],\"value\":\"How hair changes throughout the menstrual cycle\",\"nodeType\":\"text\"}],\"nodeType\":\"heading-2\"},{\"data\":{},\"content\":[{\"data\":{},\"marks\":[],\"value\":\"\",\"nodeType\":\"text\"},{\"data\":{\"target\":{\"sys\":{\"id\":\"1CPiVLb4eIMWE00ika0m0y\",\"type\":\"Link\",\"linkType\":\"Entry\"}}},\"content\":[{\"data\":{},\"marks\":[],\"value\":\"Your skin and scalp change\",\"nodeType\":\"text\"}],\"nodeType\":\"entry-hyperlink\"},{\"data\":{},\"marks\":[],\"value\":\" in response to hormonal variations occurring throughout your cycle. Some people report more bad hair days around their period (1).\",\"nodeType\":\"text\"}],\"nodeType\":\"paragraph\"},{\"data\":{},\"content\":[{\"data\":{},\"marks\":[],\"value\":\"Many of the changes you may be associating with your hair throughout your cycle are due to the changes in oil production from your sebaceous glands. Since \",\"nodeType\":\"text\"},{\"data\":{},\"marks\":[{\"type\":\"italic\"}],\"value\":\"sebum\",\"nodeType\":\"text\"},{\"data\":{},\"marks\":[],\"value\":\" (oil produced by the sebaceous gland) and the hair follicle exit from the same opening in the skin, the hair and skin surrounding may be coated in sebum.\",\"nodeType\":\"text\"}],\"nodeType\":\"paragraph\"},{\"data\":{},\"content\":[{\"data\":{},\"marks\":[],\"value\":\"Sebum production is influenced by your hormones, particularly \",\"nodeType\":\"text\"},{\"data\":{\"target\":{\"sys\":{\"id\":\"6nKsXVzjAwg8GW2cpiFSZl\",\"type\":\"Link\",\"linkType\":\"Entry\"}}},\"content\":[{\"data\":{},\"marks\":[],\"value\":\"androgens\",\"nodeType\":\"text\"}],\"nodeType\":\"entry-hyperlink\"},{\"data\":{},\"marks\":[],\"value\":\" (like testosterone) (2,3). \",\"nodeType\":\"text\"}],\"nodeType\":\"paragraph\"},{\"data\":{},\"content\":[{\"data\":{},\"marks\":[],\"value\":\"Sebum production often ramps up greatly during \",\"nodeType\":\"text\"},{\"data\":{\"uri\":\"https://helloclue.com/articles/puberty\"},\"content\":[{\"data\":{},\"marks\":[],\"value\":\"puberty\",\"nodeType\":\"text\"}],\"nodeType\":\"hyperlink\"},{\"data\":{},\"marks\":[],\"value\":\", often being produced at high amounts between the ages of 15 to 35, as assessed on the skin (4). \",\"nodeType\":\"text\"},{\"data\":{\"target\":{\"sys\":{\"id\":\"3RKzDbEfGfZGWZfxXQK0qp\",\"type\":\"Link\",\"linkType\":\"Entry\"}}},\"content\":[{\"data\":{},\"marks\":[],\"value\":\"Estrogen\",\"nodeType\":\"text\"}],\"nodeType\":\"entry-hyperlink\"},{\"data\":{},\"marks\":[],\"value\":\" also influences sebum production, particularly by suppressing levels of sebum production and sebaceous gland activation, especially at high doses (2,3,5-7). In a study of sebum production on the skin, people with oily-type skin noticed an increase in sebum production during their premenstrual and menstrual period, with the lowest amount of sebum production during the second week of their cycle (8).\",\"nodeType\":\"text\"}],\"nodeType\":\"paragraph\"},{\"data\":{\"target\":{\"sys\":{\"id\":\"7LUypuH9nXa9u0f7wWfKQ9\",\"type\":\"Link\",\"linkType\":\"Entry\"}}},\"content\":[],\"nodeType\":\"embedded-entry-block\"},{\"data\":{},\"content\":[{\"data\":{},\"marks\":[],\"value\":\"One \",\"nodeType\":\"text\"},{\"data\":{\"uri\":\"https://www.ncbi.nlm.nih.gov/pubmed/17163928\"},\"content\":[{\"data\":{},\"marks\":[],\"value\":\"study\",\"nodeType\":\"text\"}],\"nodeType\":\"hyperlink\"},{\"data\":{},\"marks\":[],\"value\":\" (\",\"nodeType\":\"text\"},{\"data\":{},\"marks\":[{\"type\":\"italic\"}],\"value\":\"'Bad hair days', scalp sebum excretion and the menstrual cycle\",\"nodeType\":\"text\"},{\"data\":{},\"marks\":[],\"value\":\") had an interesting finding: even if more bad hair days were registered around the time of menstruation, they did not correlate with increases in scalp sebum levels (1). There was not a clear explanation for the bad hair days—perhaps it’s due to a difference in participants’ personal perception of their hair (1). Is the change on your head or in your head? \",\"nodeType\":\"text\"}],\"nodeType\":\"paragraph\"},{\"data\":{},\"content\":[{\"data\":{},\"marks\":[],\"value\":\"Some hormonal contraceptive medications (like chlormadinone acetate, a synthetic progesterone which provides anti-androgen activity) may also affect hair and skin quality (9). In \",\"nodeType\":\"text\"},{\"data\":{\"uri\":\"https://www.ncbi.nlm.nih.gov/pubmed/22404700\"},\"content\":[{\"data\":{},\"marks\":[],\"value\":\"one study\",\"nodeType\":\"text\"}],\"nodeType\":\"hyperlink\"},{\"data\":{},\"marks\":[],\"value\":\" of people taking these medications (\",\"nodeType\":\"text\"},{\"data\":{},\"marks\":[{\"type\":\"italic\"}],\"value\":\"Effects of an oral contraceptive containing chlormadinone acetate and ethinylestradiol on hair and skin quality in women wishing to use hormonal contraception\",\"nodeType\":\"text\"},{\"data\":{},\"marks\":[],\"value\":\"), participants had decreased sebum production and improved perceived hair quality (9).\",\"nodeType\":\"text\"}],\"nodeType\":\"paragraph\"},{\"data\":{},\"content\":[{\"data\":{},\"marks\":[],\"value\":\"Understanding hair anatomy\",\"nodeType\":\"text\"}],\"nodeType\":\"heading-2\"},{\"data\":{},\"content\":[{\"data\":{},\"marks\":[],\"value\":\"If you’re curious about changes to your hair and suspect they might be linked to \",\"nodeType\":\"text\"},{\"data\":{\"target\":{\"sys\":{\"id\":\"1f2hRQT9Cpt8FwLJIqIKm4\",\"type\":\"Link\",\"linkType\":\"Entry\"}}},\"content\":[{\"data\":{},\"marks\":[],\"value\":\"hormonal changes\",\"nodeType\":\"text\"}],\"nodeType\":\"entry-hyperlink\"},{\"data\":{},\"marks\":[],\"value\":\", it’s helpful to understand the anatomy of hair.\",\"nodeType\":\"text\"}],\"nodeType\":\"paragraph\"},{\"data\":{},\"content\":[{\"data\":{},\"marks\":[],\"value\":\"There are many different types of hair that grow on your body, differing in texture, length, type, and density. Think of the difference between the hair on your head versus the fine hair on your torso. The only areas of our skin without hair growth are on the palms of hands, the soles of feet, and lips (10).\",\"nodeType\":\"text\"}],\"nodeType\":\"paragraph\"},{\"data\":{},\"content\":[{\"data\":{},\"marks\":[],\"value\":\"Each individual hair grows out of \",\"nodeType\":\"text\"},{\"data\":{},\"marks\":[{\"type\":\"italic\"}],\"value\":\"hair follicles\",\"nodeType\":\"text\"},{\"data\":{},\"marks\":[],\"value\":\". The part of the hair that you can see exiting your skin is called the \",\"nodeType\":\"text\"},{\"data\":{},\"marks\":[{\"type\":\"italic\"}],\"value\":\"hair shaft\",\"nodeType\":\"text\"},{\"data\":{},\"marks\":[],\"value\":\".\",\"nodeType\":\"text\"}],\"nodeType\":\"paragraph\"},{\"data\":{},\"content\":[{\"data\":{},\"marks\":[],\"value\":\"Each hair follicle is part of a \",\"nodeType\":\"text\"},{\"data\":{},\"marks\":[{\"type\":\"italic\"}],\"value\":\"pilosebaceous unit\",\"nodeType\":\"text\"},{\"data\":{},\"marks\":[],\"value\":\" within the skin, which consists of a hair follicle, a sebaceous gland, and a small muscle called the \",\"nodeType\":\"text\"},{\"data\":{},\"marks\":[{\"type\":\"italic\"}],\"value\":\"arrector pili\",\"nodeType\":\"text\"},{\"data\":{},\"marks\":[],\"value\":\". The sebaceous gland produces an oil called \",\"nodeType\":\"text\"},{\"data\":{},\"marks\":[{\"type\":\"italic\"}],\"value\":\"sebum\",\"nodeType\":\"text\"},{\"data\":{},\"marks\":[],\"value\":\", which exits onto the skin through the same route of the hair.\",\"nodeType\":\"text\"}],\"nodeType\":\"paragraph\"},{\"data\":{\"target\":{\"sys\":{\"id\":\"3oOQq1UpQAXRZvPmYCfanp\",\"type\":\"Link\",\"linkType\":\"Entry\"}}},\"content\":[],\"nodeType\":\"embedded-entry-block\"},{\"data\":{},\"content\":[{\"data\":{},\"marks\":[],\"value\":\"The arrector pili is a very small muscle that is attached to each individual hair follicle. When you are cold or scared, you may notice that your skin turns bumpy and the hairs on your body stand on end (goose bumps)—you can thank this tiny muscle for this. Some hairs, like the hairs on your head, can be in their active growing phase for many years, while other hairs, like the ones on your eyebrows, may only grow for a couple of months before they are shed (11).\",\"nodeType\":\"text\"}],\"nodeType\":\"paragraph\"},{\"data\":{},\"content\":[{\"data\":{},\"marks\":[],\"value\":\"There are three phases of a hair’s life cycle. The growing phase (\",\"nodeType\":\"text\"},{\"data\":{},\"marks\":[{\"type\":\"italic\"}],\"value\":\"anagen phase\",\"nodeType\":\"text\"},{\"data\":{},\"marks\":[],\"value\":\"), the end of the active growth of the hair (\",\"nodeType\":\"text\"},{\"data\":{},\"marks\":[{\"type\":\"italic\"}],\"value\":\"catagen phase\",\"nodeType\":\"text\"},{\"data\":{},\"marks\":[],\"value\":\"), and the final resting phase where the hair is dead and will eventually fall out (\",\"nodeType\":\"text\"},{\"data\":{},\"marks\":[{\"type\":\"italic\"}],\"value\":\"telogen phase\",\"nodeType\":\"text\"},{\"data\":{},\"marks\":[],\"value\":\") (10,11). Losing hairs every day is part of the natural life cycle of the hair—losing between 50 to 150 scalp hairs per day is normal (11). \",\"nodeType\":\"text\"}],\"nodeType\":\"paragraph\"},{\"data\":{},\"content\":[{\"data\":{},\"marks\":[],\"value\":\"Hair changes in pregnancy, menopause, and PCOS\",\"nodeType\":\"text\"}],\"nodeType\":\"heading-2\"},{\"data\":{},\"content\":[{\"data\":{},\"marks\":[],\"value\":\"\",\"nodeType\":\"text\"},{\"data\":{\"target\":{\"sys\":{\"id\":\"49zkVDlmPapKeY9ekvjFAi\",\"type\":\"Link\",\"linkType\":\"Entry\"}}},\"content\":[{\"data\":{},\"marks\":[],\"value\":\"During pregnancy\",\"nodeType\":\"text\"}],\"nodeType\":\"entry-hyperlink\"},{\"data\":{},\"marks\":[],\"value\":\", some people may notice increased hair thickness. This is because the number of hairs shed daily is reduced. Pregnancy influences hair follicles to stay within their growth phase (anagen phase) longer than they would normally (12).\",\"nodeType\":\"text\"}],\"nodeType\":\"paragraph\"},{\"data\":{},\"content\":[{\"data\":{},\"marks\":[],\"value\":\"After delivery, it is normal to notice increased amounts of hair loss, as all the hairs that stayed in prolonged anagen phase change over together into catagen phase (11,12). This is considered common and should not be any reason to panic. Even if it feels like you may be losing an abnormal amount of hair, it is just an accumulation of all the hair you would have normally lost during the time you were pregnant (12).\",\"nodeType\":\"text\"}],\"nodeType\":\"paragraph\"},{\"data\":{},\"content\":[{\"data\":{},\"marks\":[],\"value\":\"Other changes that can occur to your hair during pregnancy are an increase in hair fiber diameter—i.e. hair thickness—as it grows from the scalp, in comparison to women who were not pregnant (13). This change in hair diameter may also contribute to feelings of increased hair thickness during pregnancy.\",\"nodeType\":\"text\"}],\"nodeType\":\"paragraph\"},{\"data\":{},\"content\":[{\"data\":{},\"marks\":[],\"value\":\"Hair growth may also change around the time of \",\"nodeType\":\"text\"},{\"data\":{\"target\":{\"sys\":{\"id\":\"3c9JIRfqeq0mTgW4Wd76PQ\",\"type\":\"Link\",\"linkType\":\"Entry\"}}},\"content\":[{\"data\":{},\"marks\":[],\"value\":\"menopause\",\"nodeType\":\"text\"}],\"nodeType\":\"entry-hyperlink\"},{\"data\":{},\"marks\":[],\"value\":\", as sex hormone levels change in availability. Some people may notice they develop female pattern hair loss, where their hairline may stay the same, but hair follicle density decreases around the top and sides of the head (12). Facial hirsutism (abnormal hair growth) is also common after menopause, with around half of post-menopausal women reporting excessive facial hair growth (12,14). \",\"nodeType\":\"text\"}],\"nodeType\":\"paragraph\"},{\"data\":{},\"content\":[{\"data\":{},\"marks\":[],\"value\":\"Another very common cause of hirsutism is \",\"nodeType\":\"text\"},{\"data\":{},\"marks\":[{\"type\":\"italic\"}],\"value\":\"polycystic ovarian syndrome\",\"nodeType\":\"text\"},{\"data\":{},\"marks\":[],\"value\":\" (\",\"nodeType\":\"text\"},{\"data\":{\"uri\":\"https://helloclue.com/articles/pcos\"},\"content\":[{\"data\":{},\"marks\":[],\"value\":\"PCOS\",\"nodeType\":\"text\"}],\"nodeType\":\"hyperlink\"},{\"data\":{},\"marks\":[],\"value\":\"), in which androgen levels are abnormally high. In both PCOS and after menopause, the levels of androgens are relatively higher. This excess in androgens promotes hair to grow thicker, darker, and increase sebum production (10,12).\",\"nodeType\":\"text\"}],\"nodeType\":\"paragraph\"},{\"data\":{\"target\":{\"sys\":{\"id\":\"5FzJsm5n8dmDvSQkri33DC\",\"type\":\"Link\",\"linkType\":\"Entry\"}}},\"content\":[],\"nodeType\":\"embedded-entry-block\"},{\"data\":{},\"content\":[{\"data\":{},\"marks\":[],\"value\":\"What’s average and healthy\",\"nodeType\":\"text\"}],\"nodeType\":\"heading-2\"},{\"data\":{},\"content\":[{\"data\":{},\"marks\":[],\"value\":\"Every person’s hair is different, just as every body is different. Color, length, thickness, curl—there is no such thing as average or normal hair—only what is “average and normal” for you. \",\"nodeType\":\"text\"},{\"data\":{},\"marks\":[{\"type\":\"bold\"}],\"value\":\"Hair is very different from person to person\",\"nodeType\":\"text\"},{\"data\":{},\"marks\":[],\"value\":\". \",\"nodeType\":\"text\"}],\"nodeType\":\"paragraph\"},{\"data\":{},\"content\":[{\"data\":{},\"marks\":[],\"value\":\"Some researchers have tried to assess the speed at which hair grows, and they found that scalp hair grows about 15 cm (6 inches) a year, or 1.25 cm (0.5 inches) per month (15). \",\"nodeType\":\"text\"}],\"nodeType\":\"paragraph\"},{\"data\":{},\"content\":[{\"data\":{},\"marks\":[],\"value\":\"There are many other culprits other than your hormones that can account for a bad hair day. These include environmental factors (smog, smoke, exposure to UV light, saltwater), hair care products, perming, bleaching, hair dyeing, excessive use of hair products, infrequent washing, rough brushing, and excessive heat styling (1,16). \",\"nodeType\":\"text\"}],\"nodeType\":\"paragraph\"},{\"data\":{},\"content\":[{\"data\":{},\"marks\":[{\"type\":\"bold\"}],\"value\":\"\",\"nodeType\":\"text\"},{\"data\":{\"uri\":\"https://app.adjust.com/f7a8td\"},\"content\":[{\"data\":{},\"marks\":[{\"type\":\"bold\"}],\"value\":\"Use Clue\",\"nodeType\":\"text\"}],\"nodeType\":\"hyperlink\"},{\"data\":{},\"marks\":[{\"type\":\"bold\"}],\"value\":\" to track how your hair changes throughout your cycle.\",\"nodeType\":\"text\"},{\"data\":{},\"marks\":[],\"value\":\" \",\"nodeType\":\"text\"}],\"nodeType\":\"paragraph\"},{\"data\":{},\"content\":[{\"data\":{},\"marks\":[],\"value\":\"You can track your hair daily as “\",\"nodeType\":\"text\"},{\"data\":{},\"marks\":[{\"type\":\"italic\"}],\"value\":\"Good\",\"nodeType\":\"text\"},{\"data\":{},\"marks\":[],\"value\":\"”, “\",\"nodeType\":\"text\"},{\"data\":{},\"marks\":[{\"type\":\"italic\"}],\"value\":\"Bad\",\"nodeType\":\"text\"},{\"data\":{},\"marks\":[],\"value\":\"”, “\",\"nodeType\":\"text\"},{\"data\":{},\"marks\":[{\"type\":\"italic\"}],\"value\":\"Oily\",\"nodeType\":\"text\"},{\"data\":{},\"marks\":[],\"value\":\"”, or “\",\"nodeType\":\"text\"},{\"data\":{},\"marks\":[{\"type\":\"italic\"}],\"value\":\"Dry\",\"nodeType\":\"text\"},{\"data\":{},\"marks\":[],\"value\":\"”. If you want to track more, you can \",\"nodeType\":\"text\"},{\"data\":{\"uri\":\"https://support.helloclue.com/hc/en-us/articles/4417183485076-How-can-I-create-my-own-tracking-options\"},\"content\":[{\"data\":{},\"marks\":[],\"value\":\"create a custom tag\",\"nodeType\":\"text\"}],\"nodeType\":\"hyperlink\"},{\"data\":{},\"marks\":[],\"value\":\". \",\"nodeType\":\"text\"}],\"nodeType\":\"paragraph\"}],\"nodeType\":\"document\"}","references":[{"__typename":"ContentfulAppDownloadWidget","contentful_id":"44KqIALQXFaMrpG77kwnlK","message":"Download Clue to track your good and bad hair 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Keep up with us by subscribing to our monthly menstrual health newsletter."}}],"assets":null}]},"references":{"references":"1. Birch MP, Messenger A. 'Bad hair days', scalp sebum excretion and the menstrual cycle. J Cosmet Dermatol. 2003;2(3-4):190-4.\n2. Hermanns-Le T, Hermanns JF, Lesuisse M, Pierard GE. Cyclic catamenial dermatoses. Biomed Res Int. 2013;2013:156459.\n3.  George R, Clarke S, Thiboutot D. Hormonal therapy for acne. Semin Cutan Med Surg. 2008 Sep;27(3):188-96.\n4. Jacobsen E, Billings JK, Frantz RA, Kinney CK, Stewart ME, Downing DT. Age-related changes in sebaceous wax ester secretion rates in men and women. J Invest Dermatol. 1985;85(5):483-5.\n5. Elsaie ML. Hormonal treatment of acne vulgaris: an update. Clin Cosmet Investig Dermatol. 2016 Sep 2;9:241-8.\n6. Thiboutot D. Acne: hormonal concepts and therapy. Clin Dermatol. 2004 Sep-Oct;22(5):419-28.\n7. Farage MA, Neill S, MacLean AB. Physiological changes associated with the menstrual cycle: a review. Obstet Gynecol Surv. 2009 Jan;64(1):58-72. \n8. Pierard-Franchimont C, Pierard GE, Kligman AM. Rhythm of sebum excretion during the menstrual cycle. Dermatologica. 1991;182(4):211-3.\n9. Kerscher M, Reuther T, Krueger N, Buntrock H. Effects of an oral contraceptive containing chlormadinone acetate and ethinylestradiol on hair and skin quality in women wishing to use hormonal contraception. J Eur Acad Dermatol Venereol. 2013 May;27(5):601-8. \n10. Randall VA. Androgens and hair growth. Dermatol Ther. 2008 Sep-Oct;21(5):314-28. \n11. Paus R, Cotsarelis G. The biology of hair follicles. N Engl J Med. 1999 Aug 12;341(7):491-7.\n12. Piérard-Franchimont C, Piérard GE. Alterations in hair follicle dynamics in women. Biomed Res Int. 2013;2013:957432. \n13. Nissimov J, Elchalal U. Scalp hair diameter increases during pregnancy. Clin Exp Dermatol. 2003;28(5):525-30.\n14.  Blume-Peytavi U, Atkin S, Gieler U, Grimalt R. Skin academy: hair, skin, hormones and menopause - current status/knowledge on the management of hair disorders in menopausal women. Eur J Dermatol. 2012 May-Jun;22(3):310-8.\n15. Loussouarn G, Lozano I, Panhard S, Collaudin C, El Rawadi C, Genain G. Diversity in human hair growth, diameter, colour and shape. An in vivo study on young adults from 24 different ethnic groups observed in the five continents. European Journal of Dermatology. 2016 Mar 1;26(2):144-54.\n16. Dawber R. Cosmetic and medical causes of hair weathering. J Cosmet Dermatol. 2002;1(4):196-201.\n"},"partnerships":null,"relatedArticles":null,"articleFooterDownloadWidgetText":null},"recommendedArticles":{"edges":[{"node":{"id":"78SeiUhVRcKhqpuFlMPZnb","title":"How hair, exercise, and sex are all related to your cycle","slug":"cycle-a-z/how-hair-exercise-and-sex-are-all-related-to-your-cycle","snippet":"Why do bad hair days happen? Why does sex feel amazing on some days and not as great on others? 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