Chemosis is swelling of the eye surface membranes because of accumulation of fluid. This symptom is often related to an allergic response. Over-the-counter antihistamines, and a cool cloth placed over the eyes, are usually used to try to alleviate the symptoms.
Review Date 5/1/2019
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.