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Classically, it is caused by radiation therapy to the head and systemic chemotherapy, especially with alkylating agents. [ 1 ] [ 2 ] : 753–4 Anagen effluvium is due to an acute injury to the hair follicles by an endogenous or exogenous cause, resulting in sudden diffuse shedding of structurally damaged hairs.
The idea is that the intense cold narrows the blood vessels in the scalp, reducing the amount of the chemo drug that gets into the follicles, preventing as many hairs from falling out, according ...
At the end of the resting phase, the hair falls out (exogen) and a new hair starts growing in the follicle, beginning the cycle again. Normally, about 40 (0–78 in men) hairs reach the end of their resting phase each day and fall out. [28] When more than 100 hairs fall out per day, clinical hair loss (telogen effluvium) may occur.
The quantity of hairs depends on hair colour (before graying): [7] [8] an average blond-haired person has 150,000 hairs, a brown-haired person has 110,000, a black-haired person has 100,000, and a redhead has 90,000. [9] Hair growth stops at death; the illusion of growth after death is due to shrinkage of the skin by drying. [10]
The Norwood Scale. Generally, however, the seven stages of hair loss according to the Norwood scale look like this: Stage 1: the hairline begins to recede subtly, usually at the temples
After being diagnosed with breast cancer last year, Jenna Fischer immediately wondered if she would lose her hair. In an emotional sit-down with Today's Hoda Kotb that aired on Monday, Oct. 21 ...