Tummy muscle pain after appendicitis surgery may be caused by normal recovery process, or wound infection, intestinal adhesions and other reasons. 1. Normal recovery process: appendicitis surgery will cause damage to the local muscles, a short period of time the nerve function may not have recovered, which will lead to the symptoms of tummy muscle pain, it may also be the wound is not healed, the pain caused by the local nerve pulling. 2. Wound infection: after appendicitis surgery, if there is secondary bacterial infection in the wound, it will cause redness, swelling and pain in the skin around the wound, which will also lead to stomach muscle pain after appendicitis surgery. 3. Intestinal adhesion: appendicitis surgery may be secondary to intestinal adhesions and other complications, which can also lead to symptoms of stomach muscle pain after appendicitis surgery. There may be other reasons for stomach muscle pain after appendicitis surgery, it is recommended to go to the hospital for examination, to clarify the cause of the disease, and follow the doctor’s instructions for treatment.