Due to hormonal changes, irritation or damage, some hair follicles have a shorter growth phase and produce thinner, shorter hair shafts. Your hair goes through a cycle of growth and rest. During each cycle varies from one person. But overall, the hair growth phase, called anagen, typically lasts two to three years. Meanwhile, the hair grows a little less than 1 / 2 inch (1 centimeter) per month. The resting phase called telogen. This stage usually lasts three to four months. At the end of the resting phase, the hair falls out and touch a new beginning to develop in its place. Once the hair falls out, the growth stage begins again.
Most people normally shed 50 to 100 hairs per day. But with about 100,000 hairs on the scalp, this amount of hair loss does not cause noticeable thinning hair.
Gradual thinning is a normal part of aging. However, hair loss can lead to baldness when the amount of shedding exceeds the amount of regrowth, when new hair is thinner than the hair shed or when hair comes out in patches.
Causes of specific types of hair loss
Baldness (androgenetic alopecia). In men and women pattern baldness will shorten the growing season, and the hairs are not as thick or solid. With each growth cycle, hair becomes more shallow roots and fall more easily. Heredity probably plays a key role. A history of androgenetic alopecia on either side of your family increases the risk of baldness. Heredity also influences the age at which you begin to lose hair and the speed of development, the pattern and extent of your baldness.
Cicatricial (scarring) alopecia. This type of permanent hair loss occurs when inflammation damages and scars the hair follicle. This prevents the growth of new hair. This condition can be seen in various skin diseases such as lupus erythematosus or lichen planus. It is not known what triggers or causes this inflammation.
Alopecia areata. This is classified as an autoimmune disease, but the cause is unknown. People who develop alopecia areata are generally in good health. Some people may have other autoimmune diseases, including thyroid disease. Some researchers believe that some people are genetically predisposed to develop alopecia areata and that a trigger like a virus or something in the environment triggers the disease. A family history of alopecia areata makes you more likely to develop it. With alopecia areata, your hair generally grows back, but you may lose your hair grows and a number of times.
Telogen effluvium. This type of hair loss is usually due to a change in your normal cycle of hair. This can occur when a kind of shock to your system - emotional or physical - causes hair roots to be pushed prematurely into the resting state. The affected growing hairs from these hair roots fall. In a month or two, the hair follicles become active again, and new hair begins to grow. Telogen effluvium may follow emotional problems, such as a death in the family or a physiological stress such as high fever, sudden weight loss or excessive, extreme food, nutritional deficiencies, surgery, or metabolic disorders. Hair grows back normally once the condition that caused it corrects itself, but it usually takes several months.
Traction alopecia. Coiffure excessive or hairstyles that pull your hair too tight cause traction alopecia. If the attraction is stopped before there is scarring of your scalp and permanent damage to the root, hair usually grows back normally.
Other causes of hair loss
Poor nutrition. Having inadequate protein or iron in your diet or poor diet in other ways that you can experience hair loss. Fad diets, crash diets and certain diseases, such as eating disorders, can cause poor nutrition.
Drugs. Some medicines used to treat gout, arthritis, depression, heart problems and high blood pressure may cause hair loss in some people. Birth control pills may also cause hair loss in some women.
Disease. Diabetes and lupus can cause hair loss.
Pharmaceutical care. Chemotherapy or radiation can induce the development of alopecia. In these circumstances, a healthy, growing (anagen) hair can be affected. When treatment ends, your hair typically begins to grow.
Hormonal changes. Hormonal changes and imbalances can cause temporary loss of hair. This may be due to pregnancy, childbirth, termination of the contraceptive pill, the onset of menopause, or hyperthyroidism or hypothyroidism. Hair loss can be postponed by three months of hormonal changes, and it will take another three months for new hair to grow back. During pregnancy, it is normal to have a thick, luxuriant hair. It 'is also common to lose more hair than normal about three months after delivery. If a hormonal imbalance linked to overproduction of testosterone, can have thinning hair on the crown of the scalp. Correcting hormonal imbalances may stop the hair loss.
Hair treatments. Chemicals used for dying, coloring, bleaching, straightening or permanent waves can cause hair to break and cause damage if they are abused or used incorrectly. Overstyling and brushing can also cause excessive hair loss, if the hair shaft is damaged.
Infection of the scalp. Infections such as ringworm, can invade the skin and the hair on your scalp resulting in hair loss. Once infections are treated, in general, hair grows back. Ringworm, a fungal infection, can usually be treated with topical or oral antifungal medications.
Trichotillomania (hair pulling disorder). Trichotillomania is a form of mental illness where people have an irresistible urge to get out of their hair, whether from the scalp, eyebrows or other body areas. Pulling hair from the scalp often leaves patchy with bald spots on their heads because they can go very far to hide. Causes of trichotillomania are still studied and no specific cause has yet been found.
Most people normally shed 50 to 100 hairs per day. But with about 100,000 hairs on the scalp, this amount of hair loss does not cause noticeable thinning hair.
Gradual thinning is a normal part of aging. However, hair loss can lead to baldness when the amount of shedding exceeds the amount of regrowth, when new hair is thinner than the hair shed or when hair comes out in patches.
Causes of specific types of hair loss
Baldness (androgenetic alopecia). In men and women pattern baldness will shorten the growing season, and the hairs are not as thick or solid. With each growth cycle, hair becomes more shallow roots and fall more easily. Heredity probably plays a key role. A history of androgenetic alopecia on either side of your family increases the risk of baldness. Heredity also influences the age at which you begin to lose hair and the speed of development, the pattern and extent of your baldness.
Cicatricial (scarring) alopecia. This type of permanent hair loss occurs when inflammation damages and scars the hair follicle. This prevents the growth of new hair. This condition can be seen in various skin diseases such as lupus erythematosus or lichen planus. It is not known what triggers or causes this inflammation.
Alopecia areata. This is classified as an autoimmune disease, but the cause is unknown. People who develop alopecia areata are generally in good health. Some people may have other autoimmune diseases, including thyroid disease. Some researchers believe that some people are genetically predisposed to develop alopecia areata and that a trigger like a virus or something in the environment triggers the disease. A family history of alopecia areata makes you more likely to develop it. With alopecia areata, your hair generally grows back, but you may lose your hair grows and a number of times.
Telogen effluvium. This type of hair loss is usually due to a change in your normal cycle of hair. This can occur when a kind of shock to your system - emotional or physical - causes hair roots to be pushed prematurely into the resting state. The affected growing hairs from these hair roots fall. In a month or two, the hair follicles become active again, and new hair begins to grow. Telogen effluvium may follow emotional problems, such as a death in the family or a physiological stress such as high fever, sudden weight loss or excessive, extreme food, nutritional deficiencies, surgery, or metabolic disorders. Hair grows back normally once the condition that caused it corrects itself, but it usually takes several months.
Traction alopecia. Coiffure excessive or hairstyles that pull your hair too tight cause traction alopecia. If the attraction is stopped before there is scarring of your scalp and permanent damage to the root, hair usually grows back normally.
Other causes of hair loss
Poor nutrition. Having inadequate protein or iron in your diet or poor diet in other ways that you can experience hair loss. Fad diets, crash diets and certain diseases, such as eating disorders, can cause poor nutrition.
Drugs. Some medicines used to treat gout, arthritis, depression, heart problems and high blood pressure may cause hair loss in some people. Birth control pills may also cause hair loss in some women.
Disease. Diabetes and lupus can cause hair loss.
Pharmaceutical care. Chemotherapy or radiation can induce the development of alopecia. In these circumstances, a healthy, growing (anagen) hair can be affected. When treatment ends, your hair typically begins to grow.
Hormonal changes. Hormonal changes and imbalances can cause temporary loss of hair. This may be due to pregnancy, childbirth, termination of the contraceptive pill, the onset of menopause, or hyperthyroidism or hypothyroidism. Hair loss can be postponed by three months of hormonal changes, and it will take another three months for new hair to grow back. During pregnancy, it is normal to have a thick, luxuriant hair. It 'is also common to lose more hair than normal about three months after delivery. If a hormonal imbalance linked to overproduction of testosterone, can have thinning hair on the crown of the scalp. Correcting hormonal imbalances may stop the hair loss.
Hair treatments. Chemicals used for dying, coloring, bleaching, straightening or permanent waves can cause hair to break and cause damage if they are abused or used incorrectly. Overstyling and brushing can also cause excessive hair loss, if the hair shaft is damaged.
Infection of the scalp. Infections such as ringworm, can invade the skin and the hair on your scalp resulting in hair loss. Once infections are treated, in general, hair grows back. Ringworm, a fungal infection, can usually be treated with topical or oral antifungal medications.
Trichotillomania (hair pulling disorder). Trichotillomania is a form of mental illness where people have an irresistible urge to get out of their hair, whether from the scalp, eyebrows or other body areas. Pulling hair from the scalp often leaves patchy with bald spots on their heads because they can go very far to hide. Causes of trichotillomania are still studied and no specific cause has yet been found.
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