Appendicitis is a medical condition in which the appendix (a small, finger-like pouch located in the lower right-hand side of the abdomen) becomes inflamed, swollen, and filled with pus. The condition is quite painful and can be life-threatening if not treated promptly. The exact cause of appendicitis is not known, but experts believe it is caused by a blockage of the appendix, which can be caused by anything from a hard piece of stool to an infection. Other possible causes include tumors, foreign bodies, or the presence of parasites. The most common symptom of appendicitis is severe abdominal pain. The pain typically starts in the lower right-hand side of the abdomen, but can move to other areas as the condition progresses. Other symptoms include fever, nausea, vomiting, loss of appetite, and constipation or diarrhea. If you suspect you may have appendicitis, it is important to seek medical attention right away. Doctors will typically perform a physical exam and order a CT scan to diagnose the condition. Treatment typically involves antibiotics and surgery to remove the appendix. Appendicitis can be a serious condition that requires prompt medical attention. If you suspect you may have appendicitis, it is important to seek medical attention right away. Early diagnosis and treatment can reduce your risk of complications, such as a ruptured appendix.