Hair loss or, Alopecia, can have many different causes and requires a detailed history to determine the most likely cause. Potential causes include pregnancy and childbirth, illness, thyroid disease, inadequate protein in diet, certain medications, cancer treatments, low serum iron, major surgery, hormone imbalances, fungal infections, and emotional stress. Family history also plays a large part and is the most common cause of thinning hair. The work up for alopecia often includes blood work to help determine the potential cause. There are many treatment options for hair loss, although nothing is considered curative. Topical steroids and steroid injections into the scalp can help by promoting new hair growth. There are also oral medications available for men with hair loss, which may slow the progression of the loss and increase the hair count. Hair transplants can also be an option when appropriate.