The appendix is a small pouch connected to the cecum, which is part of your intestines near where the small and large intestine connect. The appendix doesn't lead anywhere; it just kind of hangs off doing nothing and serving no known purpose. Appendicitis happens when fecal matter gets trapped in the appendix and as a result the appendix becomes infected. In case you wanted to know exactly how it happens.
Appendicitis is an infection in your appendix. It really should not matter what you eat. What type of symptoms are you having?