Appendicitis is an inflammation of the appendix that most commonly affects adolescents and young adults. It is usually caused by a blockage in the appendix from items like stool or parasites. Common symptoms include abdominal pain localized to the lower right side of the abdomen. A physical exam may reveal tenderness at McBurney's point. Blood tests and imaging scans can help confirm the diagnosis. Treatment involves antibiotics and surgical removal of the appendix (appendectomy) to prevent rupture. Nursing care focuses on relieving pain, preventing infection and complications, and ensuring proper recovery post-operation.