Appendicitis is a medical condition in which the appendix, a small organ attached to the large intestine, becomes inflamed and may require surgical removal. It can be incredibly painful and is generally considered to be a medical emergency.
A condition similar to appendicitis but not the same is diverticulitis. Diverticulitis is a condition in which small pouches form in the lining of the large intestine, and become inflamed and infected. It can cause severe abdominal pain and cramping, as well as fever, nausea, and diarrhea. Treatment usually involves antibiotics, although surgery may be necessary in some cases.
Another condition similar to appendicitis is gastritis. Gastritis is an inflammation of the lining of the stomach, usually caused by a bacterial infection or an autoimmune response. Symptoms include abdominal pain, nausea, and vomiting, and can be treated with antibiotics and other medications.
Finally, another condition similar to appendicitis is intestinal obstruction. Intestinal obstruction occurs when the small or large intestine becomes blocked, usually by a tumor or foreign object. Symptoms include abdominal pain, nausea, vomiting, and bloating, and treatment usually involves surgery to remove the obstruction.