(HealthDay News) -- Losing your hair may not be a typical sign of aging. It may be caused by a medical condition, experts say.

The American Academy of Dermatology says possible causes of hair loss include:

  • Diseases including hypothyroidism and anemia.
  • Major surgery.
  • A high fever.
  • Certain treatments for cancer, including chemotherapy and radiation.
  • A scalp infection, such as ringworm.