Appendicitis is a common reason for belly pain. It happens when the appendix becomes infected and inflamed.
Your appendix is a small, finger-shaped sac that is attached to your large intestine. Experts do not know what the appendix does in the body. Most of the time it does not cause problems.
Last Revised: April 5, 2011
Author: Healthwise Staff
Medical Review: Anne C. Poinier, MD - Internal Medicine & E. Gregory Thompson, MD - Internal Medicine
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