If your thyroid gland is overactive or underactive, your
hair may fall out. This
hair loss usually can be helped by treatment 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 stop your hair loss.
Many women notice hair loss about 3 months after they've had a baby. This loss is also related to hormones.