If you have a sharp, building pain in your abdomen and you’re not sure why, it wouldn’t be outlandish to think it’s appendicitis. To the right or the left of your stomach, above or below -- appendicitis can pack its punch in any of these areas.
Keep in mind, though, that sharp abdominal pain can be due to a number of factors. The Mayo Clinic’s health information pages list several possibilities, including acid reflux, diverticulitis, endometriosis, kidney stones, intestinal obstruction, stomach flu and hernias.
It’s vital to work with your health care practitioner on a diagnosis. If it really is appendicitis, you need immediate medical care.
The center of attention in appendicitis is, strangely enough, a small, finger-shaped projection from your colon that has no known use in human anatomy.
The appendix can become inflamed and filled with pus.
https://www.empowher.com/appendicitis/content/knowing-when-abdominal-pain-appendicitis