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SKIN ENCYCLOPEDIA

Alopecia areata

August 15, 2026

Hair Loss & Scalp

원형탈모

A condition in which hair falls out in round or oval patches with clear borders, known to involve an autoimmune reaction.

What kind of condition it is

It may occur in only one place or appear in several. Stress is mentioned as a triggering factor, but it is not the only cause.

Good to know

It sometimes recovers on its own, but it may also recur or widen in extent. If a sudden patch of hair loss appears, it is best to have it assessed at a consultation.

This entry is general medical information provided to aid understanding. It does not guarantee the results of any specific treatment or product, and diagnostic and treatment methods and their outcomes may differ depending on each person's condition. Please confirm the details through a medical consultation.

Director Kim Hyun-joo
Kim Hyun-jooDirector of Mason Clinic · Medical content author/reviewer

Graduate of Kyung Hee University School of Medicine (Magna cum laude) · Former director of Plus Hu Clinic, Girin Plastic Surgery, and DA Plastic Surgery · Regular member of the Korean Academy of Filler, Korean Academy of Aesthetic Plastic & Laser Medicine, Korean Academy of Laser, Dermatology and Trichology (KALDAT), Korean Lifting Research Society (KAFC), Korean Association of Obesity Research Physicians, and Korean Society for the Study of Obesity · Thermage User Training Course certified expert

The medical information on this page was written and reviewed by the director of Mason Clinic. Treatment results may vary from person to person. · Last reviewed 2026-08-15