what is appendicitis caused by

Appendicitis is an inflammation of the appendix, which is a finger-shaped pouch that projects from the colon on the lower right side of the abdomen. The exact cause of appendicitis is not fully understood, but it is believed to be caused by a blockage in the lining of the appendix that results in an infection. The blockage may be caused by hardened stool, growths, enlarged tissue in the wall of the appendix, or foreign bodies such as tumors or worms. Appendicitis may also be caused by various infections such as viruses, bacteria, or parasites in the digestive tract. Although anyone can develop appendicitis, it most often occurs in people between the ages of 10 and 30. If left untreated, the appendix can rupture, leading to peritonitis, which is a serious and potentially life-threatening condition.