Pus-filled lesions (pustules) are unusual in alopecia areata, but can occur, as in this picture. The pustules are infected where medication was injected into the area.
Review Date 11/4/2020
Updated by: Elika Hoss, MD, Senior Associate Consultant, Mayo Clinic, Scottsdale, AZ. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.