The pain gradually moves to the right lower part of the abdomen. It worsens with time, and is more intense when the person moves. If the infection continues, the appendix may rupture. When this occurs, there is often relief of the pain for a short while. This improvement is followed by more intense but similar pain.
Chronic appendicitis is rare.
It causes a milder pain in the right lower abdomen that may come and go. Appendicitis occurs when bowel contents that flow into the appendix are blocked and cannot flow out. Normal intestinal bacteria get trapped and multiply. The appendix becomes swollen and infected. The blockage may be due to very thick bowel contents or another obstruction.