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The appendix is a small, tube-like organ attached to the first part of the large intestine. It is located in the lower right part of the abdomen. It has no known function. A blockage inside of the appendix causes appendicitis. The blockage leads to increased pressure, problems with blood flow, and inflammation. If the blockage is not treated, the appendix can burst and spread infection into the abdomen. This causes a condition called peritonitis.

The main symptom is pain in the abdomen, often on the right side. It is usually sudden and gets worse over time. Other symptoms may include

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Illustration of an infected appendix
Results 1 - 10 of 141 for appendicitis
  1. Appendicitis (National Library of Medicine)  
    ... function. A blockage inside of the appendix causes appendicitis. The blockage leads to increased pressure, problems with ... to pass gas Low fever Not everyone with appendicitis has all these symptoms. Appendicitis is a medical ...
  2. Appendicitis From the National Institutes of Health (National Institute of Diabetes and Digestive and Kidney Diseases)  
    ... A-Z List of Topics and Titles : Appendicitis Appendicitis On this page: What is appendicitis? What is ... through Research For More Information Acknowledgments What is appendicitis? Appendicitis is inflammation of the appendix. Appendicitis is ...
  3. Appendicitis (Nemours Foundation)  
    ... out, had appendicitis and needed surgery. What Is Appendicitis? Appendicitis is an inflammation of the appendix. The ... type of infection known as peritonitis). Symptoms of Appendicitis The classic symptoms of appendicitis are abdominal pain ...
  4. Appendicitis in Teens (American Academy of Pediatrics)  
    ... Conditions > Abdominal > Appendicitis in Teens Health Issues Listen Appendicitis in Teens Article Body Early adolescence is prime ... it has no known function. Symptoms that Suggest Appendicitis may Include: Persistent abdominal pain that migrates from ...
  5. Appendicitis (For Parents) (Nemours Foundation)  
    ... the easier it will be to treat. About Appendicitis The appendix is a small finger-like organ ... abdomen (this type of infection is called peritonitis). Appendicitis mostly affects kids and teens between 11 and ...
  6. Appendicitis (Nemours Foundation)  
    ... would it need to be removed? What Is Appendicitis? Your appendix (say: uh- pen -dix) is a ... appendix gets inflamed, or swells up, it's called appendicitis (say: uh-pen-di- sye -tis). Both kids ...
  7. Appendicitis From the National Institutes of Health (National Institute of Diabetes and Digestive and Kidney Diseases)  
    Appendicitis National Digestive Diseases Information Clearinghouse What is appendicitis? Appendicitis is inflammation of the appendix. Appendicitis is ... lower right area of the abdomen. What causes appendicitis? An obstruction, or blockage, of the appendiceal lumen ...
  8. Appendicitis is swelling (inflammation) of the appendix. The appendix is a small pouch attached to the large ... Appendicitis is a very common cause of emergency surgery. The problem most often occurs when the appendix ...
  9. ClinicalTrials.gov: Appendicitis From the National Institutes of Health (National Institutes of Health)  
  10. Appendicitis (Mayo Foundation for Medical Education and Research)  
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