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Updated May 13, 2014

Written or reviewed by a board-certified physician. See About.com's Medical Review Board.

Episcleritis is an acute inflammatory disorder of the episclera, the thin tissue between the conjunctiva and the white sclera. The episclera houses a thin network of blood vessels. Episcleritis usually looks much worse than it actually is. Although most cases of episcleritis go away on their own if left alone long enough, about one-third of cases are linked to hidden inflammatory problems present somewhere else in the body.

Symptoms of Episcleritis

Episcleritis sometimes produces a section of redness in one or both eyes. Some people may develop a white nodule of tissue in the center of the redness, known as nodular episcleritis. Many people with episcleritis have some associated pain or discomfort, but others have none. Other symptoms that may occur with episcleritis are sensitivity to light (photophobia) and a watery discharge from the eyes.

Causes of Episcleritis

In most cases of episclertis, doctors find it difficult to find out a clear cause. In more severe forms of episcleritis, underlying conditions such as inflammatory bowel disease, Crohn’s disease and ulcerative colitis are usually the culprits. Rheumatoid arthritis, psoriatic arthritis, polyarteritis nodosa, sarcoid, lupus and ankylosing spondylitis have also been known to manifest their inflammation as episcleritis.

Types of Episcleritis

There are two forms of episcleritis: simple and nodular.
  • Simple episcleritis:
  • The most common type, simple episcleritis causes bouts of recurring inflammation. Each bout usually lasts from 7 to 10 days, although longer episodes may occur when the condition is associated with another systemic condition.
  • Nodular episcleritis:
  • Nodular episcleritis produces more painful attacks of inflammation. Many people with nodular episcleritis have an associated systemic disease.

Treatment of Episcleritis

Episcleritis may go away on its own within 3 weeks if left untreated. Most doctors treat episclertis to hasten recovery. Treatment of episcleritis usually involves the following:
  • Topical corticosteroids eye drops given several times per day
  • Topical lubricant eye drops such as artificial tears
  • Cold compresses 3 to 4 times per day
  • Non-steriodal anti-inflammatory medications given by mouth are prescribed in more severe cases

What You Should Know About Episcleritis

In some cases of episcleritis, scleritis may develop, an inflammation of the sclera that can cause intense pain and loss of vision. Contact your doctor if you have symptoms of episcleritis that last for more than 2 weeks or if you have a loss of vision.


Catania, Louis J. Primary Care of the Anterior Segment, Second Edition. Appleton & Lange, 1995.

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