Health conditions that cause hair loss in women include alopecia, anemia, autoimmune disorders, thyroid disorders and polycystic ovary syndrome, reports WebMD. Skin conditions such as psoriasis and seborrheic dermatitis also contribute to hair loss in women.
There are other factors that cause women to suffer hair loss, including menopause, stress, pregnancy, physical trauma and genetics, notes WebMD. Fast, significant weigh loss and an excess of vitamin A also sometimes cause hair loss. Androgenetic alopecia is female pattern hair loss. It is a hereditary illness that affects about 50 percent of women. While this commonly begins between ages 50 and 60, it sometimes starts as early as the teen years.