Hair care and styling. Some methods of hair care or hair styles can damage hair and
cause hair loss.
Although most people with hair loss caused by
alopecia areata regrow their hair, certain people are
at greater risk for their hair not growing back. If you have a family history
of the condition, have the condition at a young age, have an
autoimmune disease, are prone to allergies (atopy), have extensive hair loss, or have abnormal
color, shape, texture, or thickness of the fingernails or toenails, you are
more likely to have permanent hair loss.