The appendix sits at the junction of the small intestine and large intestine. It’s a thin tube about four inches long. The function of the appendix is unknown but the theory is that the appendix acts as a storehouse for good bacteria.

Common appendix disorders:

For unknown reasons the appendix becomes inflamed or infected causes severe pain in the right lower part of the belly.  Symptoms include nausea and vomiting.
Carcinoid tumors
Tumors in the appendix that secrete chemicals that cause flushing and diarrhea.

medical illustration of the appendix location.