How to Say It: Ah-PEN-de-SITE-is
Appendicitis is inflammation of the appendix. The appendix is a small, tube-like organ that hangs from the large intestine. It has no known function.
This problem needs to be treated right away. Appendicitis can result in the appendix bursting and releasing its contents into the belly. This can lead to a serious infection that can be deadly.
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The exact cause is not known. It is thought to be caused by something trapped in the appendix, such as:
This problem is more common in people who are 10 to 30 years of age. The environment may also play a role since this problem happens more often in the summer months.
Other things that may raise the risk are:
Pain is the most common problem. The pain may:
Other problems may be:
If the appendix bursts, problems may be:
Note: Symptoms may be different in infants, children, older adults, and people who are pregnant.
The doctor will ask about your symptoms and health history. A physical will be done. It will focus on the abdomen. This may be enough to suspect appendicitis.
Blood and urine tests may be done to look for changes.
Images may be taken of the belly. This can be done with:
If the diagnosis is not clear, a surgery called a laparoscopy may be done to view inside the abdomen.
Antibiotics can help to treat the infection. Those with mild symptoms may get better and not need surgery right away. Most will need surgery to remove their appendix. This is called an appendectomy. It may need to be done right away.
There are no known ways to prevent this health problem.
American College of Surgeons
National Institute of Diabetes and Digestive and Kidney Diseases
Appendectomy. American College of Surgeons website. Available at: https://www.facs.org/~/media/files/education/patient%20ed/app.ashx. Accessed September 15, 2021.
Appendicitis. Merck Manual Professional Version website. Available at:
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Accessed September 15, 2021.
Appendicitis. National Institute of Diabetes and Digestive and Kidney Diseases website. Available at: https://www.niddk.nih.gov/health-information/digestive-diseases/appendicitis. Accessed September 15, 2021.
Appendicitis in adolescents and adults. EBSCO DynaMed website. Available at: https://www.dynamed.com/condition/appendicitis-in-adolescents-and-adults. Accessed September 15, 2021.
American College of Surgeons. 2021. Antibiotics treat appendicitis as well as an appendectomy in the short term for most patients. [online] Available at: https://www.facs.org/media/press-releases/2020/flum-davidson100520. Accessed October 27, 2021.
Last reviewed July 2021 by
EBSCO Medical Review Board
Mary-Beth Seymour, RN
Last Updated: 10/27/2021