The common causes of abdominal pain are peritonitis, appendicitis and intestinal perforation, etc. The surface of the belly is fine but it hurts when touched. 1. Peritonitis: peritonitis can lead to abdominal wall tension, peritonitis acute attack even plate-like abdomen, visualization can be no abnormal findings, palpation can cause severe abdominal pain, when touching the abdominal wall of the tension, but also caused by pressure pain and rebound pain. 2. Appendicitis: appendicitis in the onset of the general surface of the patient’s belly will not have abnormal performance. But when touching the belly, there may be a right lower abdominal Mars point pressure pain, rebound pain, is the appendix inflammation stimulation of the peritoneum caused by the place. 3. Gastrointestinal perforation: gastrointestinal perforation content into the abdominal cavity, stimulation of the peritoneum, causing abdominal pressure pain, rebound pain, but generally no abnormal manifestations of visual diagnosis. The surface of the belly is fine, but it hurts when you touch it, and there may be other causes, such as cholecystitis, pancreatitis, etc., which are mostly acute abdominal conditions. Therefore, we should consult the doctor in time, complete the examination, and follow the doctor’s instructions after a clear diagnosis.