Appendicitis is an inflammation of the appendix. The appendix is a small, four-inch-long tube-shaped piece of tissue situated on the lower right side of the abdomen. It remains attached to the colon. The most common symptom is severe pain in the abdomen. Therefore, it can be easily confused with other health-related symptoms. It is mostly seen in the 20s but can develop at any age. Although the symptoms might differ in case of adults and children individually. The function of an appendix is still unknown but when it tears, it has to be removed immediately to prevent any further life-threatening complications.