A stye is a relatively common infection. Styes are often caused by staphylococcus and occur in the glands that open onto the lid margin. They are red, swollen, and painful.
Review Date 8/18/2020
Updated by: Franklin W. Lusby, MD, ophthalmologist, Lusby Vision Institute, La Jolla, CA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.