The abdominal wall is frequently overlooked as a potential source of chronic abdominal pain. In anterior cutaneous nerve entrapment syndrome (ACNES), irritated intercostal nerves cause severe abdominal pain. Current textbooks fail to acknowledge ACNES. Aim of the present review is to provide detailed information on patient history, physical examination, and a three-step treatment protocol including abdominal wall injections and a localized removal of terminal branches of intercostal nerves.