Appendicitis surgery can be done for fever. Fever in appendicitis is considered to be due to pus in the appendix, which causes inflammatory reaction in the body and leads to fever. If delayed, it can easily lead to infectious shock. Appendicitis is a common clinical general surgery disease with the typical symptom of metastatic right lower abdominal pain, which presents early as epigastric pain and shifts and fixes to the right lower abdomen after about six hours. The diagnosis of appendicitis can be confirmed by the typical clinical manifestations and relevant auxiliary examination findings, including the presence of an enlarged appendix in the right lower abdomen by ultrasound of the appendix, and significantly elevated white blood cells and neutrophils by routine blood tests. Once the diagnosis of acute appendicitis is clear, in principle, timely surgery is recommended to avoid the formation of chronic appendicitis or appendiceal abscess due to delayed treatment, which may lead to adverse consequences such as infectious shock in the body.