Appendicitis can happen when the opening of the appendix to the large intestine gets blocked. Blockage can be due to hard rock-like stool(also calked a fecolith),inflammation of lymph nodes in the intestine,or even parasites. Once the appendix is blocked,it becomes inflamed and bacteria can overgrown in it.appendix is not contagious. If the infected appendix is not removed, it can eventually burst or rupture from the buildup of pressure. This may happen as soon as 24 to 72 hours after symptoms start.the infection from a ruptured appendix is very serious - it can from an abscess( a walled-off infection of pus) or spread throughout the abdomen(a type of infection known as peritonitis).
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