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- Doctors do not know why certain hair follicles are programmed to have a shorter growth period than others. Although a person's level of androgens -- male hormones normally produced by both men and women -- is believed to be a factor, hair loss has nothing to do with virility. For that matter, the presence or absence of dandruff has no effect on balding either. An individual's genes, however -- from both male and female parents -- unquestionably influence that person's predisposition to male or female pattern baldness. Temporary hair loss can occur in conjunction with a high fever, a severe illness, thyroid disorders (see Thyroid Problems, iron deficiency, general anesthesia, drug treatments, hormonal imbalance or extreme stress, and in women following childbirth. In these conditions, collectively known as telogen effluvium, a large number of hair follicles suddenly go into a resting phase, causing hair to thin noticeably. Drugs that can cause temporary hair loss include chemotherapeutic agents used in cancer treatment, anticoagulants, retinoids used to treat acne and skin problems, beta-adrenergic blockers used to control blood pressure, and oral contraceptives. Hair loss can also be caused by burns, X-rays, scalp injuries and exposure to certain chemicals -- including those used to purify swimming pools, and to bleach, dye and perm hair. In such cases, normal hair growth usually returns once the cause is eliminated. Ringworm can also cause hair loss. The causes of alopecia areata, a disorder that often strikes children or teen-agers, remain unexplained. In most cases the hair grows back, although it may be very fine and possibly white before normal coloration and thickness return. Although too-frequent washing, permanent waves, bleaching, and dyeing hair do not cause baldness, they can contribute to overall thinning by making hair weak and brittle. Tight braiding and using rollers or hot curlers can damage and break hair, and running hair picks through tight curls can scar hair follicles. In most instances hair grows back normally if the source of stress is removed, but severe damage to the hair or scalp sometimes causes permanent bald patches.Male pattern baldness scalp. buy propecia Faq baldness hair loss balding bald. Male pattern baldness scalp. Faq baldness hair loss balding bald. Male pattern baldness scalp. buy propecia Faq baldness hair loss balding bald. Buy Propecia. Faq baldness hair loss balding bald. Pérdida masculina del pelo. Prevention baldness remedy prevent hair loss. buy propecia. Prevention baldness remedy prevent hair loss. Male pattern baldness cure.
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