If there is a small amount of fluid in the abdominal cavity after appendicitis surgery, it is a normal phenomenon, especially for appendectomy completed under the luminal cavity, there will be trauma in the operation area, there are varying degrees of exudation, coupled with diffuse abdominal infection caused by appendicitis, there will be varying degrees of exudation. Inflammation should be controlled by prolonged anti-inflammatory therapy and the body will gradually absorb the fluid. Postoperative appendicitis patients should depend on the situation. For patients with more serious infection, with severe suppuration or even perforation, an abdominal drain should be left in place after surgery, just in case, so that the abdominal fluid can be actively drained and the infection can be easily controlled. However, in most patients with appendicitis, the small amount of fluid after surgery can be absorbed normally without placing an abdominal drain.