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What causes hair loss?

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Doctors don't always know why it happens, but causes can include:

  • Hormones
  • Genes
  • Stress and illness
  • Some medicines
  • Burns, injuries, and X-rays
  • Autoimmune disease may cause alopecia areata.
  • Cosmetic procedures, such as shampooing too often, perms, bleaching, and dyeing hair can make hair thin and brittle.
  • Conditions such as thyroid disease, lupus, diabetes, iron deficiency anemia, eating disorders, and anemia.
  • Diet. A low-protein diet or severely calorie-restricted diet can also cause temporary hair loss.

SOURCES: 

American Society for Dermatologic Surgery. 

American Academy of Family Physicians.

Reviewed by Stephanie S. Gardner on October 13, 2017

SOURCES: 

American Society for Dermatologic Surgery. 

American Academy of Family Physicians.

Reviewed by Stephanie S. Gardner on October 13, 2017

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What is androgenic alopecia (male pattern baldness?

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