These findings suggest that repeated forceful contractions of the abdominal wall muscles during exercise and straining, as well as chronic inflation of the abdominal wall by fat pads and by bloating, may cause strain and pain in the abdominal wall at sites predestined by anatomy. Symptom-specific anxiety may be a consequence of chronic unexplained abdominal pain. A novel classification of abdominal wall pain is proposed. The correct diagnosis will avoid repeated and costly investigations and relieve the patient's anxiety.