What Are the Causes of Sudden Hair Loss in Women?


Quick Answer

Sudden hair loss in women is likely to be caused by a medical condition such a thyroid disorder, anemia, autoimmune disease, polycysitc ovary syndrome, psoriasis or pregnancy. This is also likely if the lost hair follicles are uniform in size, says Dr. Rogers of WebMD.

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Full Answer

Sudden hair loss is unlikely to be hereditary or due to menopause. Other reasons for sudden hair loss include stress or physical trauma such as surgery and intense illness. Significant weight loss over a short period of time may instigate hair loss as well. Too much vitamin A may induce hair loss. Hair loss can also occur several weeks after any of these experiences, according to WebMD.

The most common kind of hair loss is due to a hereditary condition called female-pattern hair loss and occurs in the late 50s or 60s. This female-pattern hair loss involves shrinking hair follicles that eventually quit growing completely, according to the American Academy of Dermatology.

It is normal to lose 50 to 100 strands of hair each day, and up to 250 strands on days that hair is washed, according to The American Academy of Dermatoloy. This is no reason for concern. Other causes of hair loss include too-tight braids, dyes, flat irons and over-brushing, according to WebMD.

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