1) Appendicitis is an inflammation of the appendix that most commonly affects adolescents and young adults. It is usually caused by an infection or blockage in the appendix. 2) The abdomen is most tender at McBurney's point, which corresponds to the location of the base of the appendix. Diagnosis involves physical exam, blood tests, imaging like CT scans. 3) Treatment involves antibiotics, pain medication, and appendectomy to remove the inflamed appendix. After surgery, nurses monitor for complications and help the patient recover by managing pain, preventing infection, and maintaining nutrition.