Appendicitis is inflammation of the appendix, a worm-shaped organ located at the beginning of the large intestine (lower right abdomen) and who have no known function. The appendix may swell when it is blocked by feces, a foreign body or a tumor. Initially, the affected person will notice pain around the navel, which will go from mild to severe as the condition progresses. Subsequently, the trouble will move to stand on the appendix. The problem arises when the body rots inside the abdomen and the thin tissue that lines the abdominal cavity is also swollen. This is known as peritonitis. In this case, the pain worsens and the patient's life is in danger. Other symptoms that can lead to appendicitis are loss of appetite, vomiting, nausea, chills or fever, among others. The most common treatment is the appendix operation, which involves the removal of the abovementioned authorities, through an intervention called appendectomy. The patient's recovery depends on the state in which the appendix is at the time of surgery.