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Exudate is fluid that leaks out of blood vessels into nearby tissues. The fluid is made of cells, proteins, and solid materials. Exudate may ooze from cuts or from areas of infection or inflammation. It is also called pus.

In people who have an eye disease called diabetic retinopathy, exudates form in the retina of the eye.


Roddy GW, Ross, Jr. RH, Pathology of the retina. In: Tasman W, Jaeger EA, eds. Duane's Foundations of Clinical Ophthalmology. 2013 ed. Philadelphia, PA: Lippincott Williams & Wilkins; 2013:vol 3; chap 13.

Scheld MW. Introduction to microbial disease. In: Goldman L, Schafer AI, eds. Goldman-Cecil Medicine. 25th ed. Philadelphia, PA: Elsevier Saunders; 2015:chap 277.

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  • Last reviewed on 5/11/2015
  • Franklin W. Lusby, MD, Ophthalmologist, Lusby Vision Institute, La Jolla, CA. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.

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