Hormonal problems may cause hair loss. If your thyroid gland is overactive or underactive, your hair may fall out. This hair loss usually can be helped by treatment of the thyroid disease. Hair loss may occur if male or female hormones, known as androgens and estrogens, are out of balance. Correcting the hormone imbalance may end your hair loss.
Some medicines cause hair loss.
This type of hair loss improves when you stop taking the medicine. Certain infections can cause hair loss. Children may have hair loss caused by a fungal infection of the scalp. The infection is easily treated with antifungal medicines. Finally, hair loss may occur as part of an underlying disease, such as lupus or diabetes.