Paroxysmal pain in the abdomen after appendicitis surgery, consider the following causes: 1. It may be that the appendiceal tract is ligated after appendicitis surgery, causing an involvement reaction, which may lead to spasmodic paroxysmal pain in the abdominal intestine. The pain can cause severe nausea and vomiting when the pain is more severe. 2. It may also be due to painful incision in the abdominal wall, stimulating the painful situation around the local area, which is mainly seen in acute, purulent, or even perforated appendicitis in clinical practice. 3. The paroxysmal pain in the abdomen after surgery may be related to the patient’s drug stimulation. For paroxysmal pain in the abdomen after appendicitis surgery, it is important to find the specific cause and treat it with symptomatic support according to the etiology.