The appendix belongs to one of the immune organs of the body and has the function of secreting lymphatic fluid and maintaining the balance of intestinal flora, so it cannot be removed at will, but in the case of acute inflammation it can be removed. The lymphatic fluid secreted by the appendix contains a large number of lymphocytes, and its immunity peaks between the ages of 20 and 30, and slowly disappears after the age of 30, until it completely disappears at the age of 60. Moreover, the appendix stores a large number of flora, which can replenish the missing flora in the intestine in time. The digestive enzymes secreted by the appendix can maintain the balance of probiotics and improve the recovery of the intestinal flora. In the absence of serious pathology, arbitrary removal of the appendix may lead to a decrease in human immune function and may also increase the incidence of colon cancer. Acute appendicitis manifests as pain occurring in the upper abdomen, gradually shifting to the umbilicus, and then shifting to and confined to the right lower abdomen after a few hours, accompanied by acute gastrointestinal symptoms such as nausea, vomiting and diarrhea. Appendectomy is an option only if the acute inflammation meets the indications for surgery, if there is long-term recurrent inflammation of the appendix or if the doctor recommends appendectomy after examination, and most patients can opt for minimally invasive surgical resection. After surgery, we need to pay attention to the diet, do not consume spicy and stimulating foods, and we can consume some foods with nutritional value such as buttermilk and millet porridge to promote the recovery of the body.