Standing stomach pain lying down does not hurt, may be related to gastrointestinal dysfunction, abdominal organ inflammation. 1. Gastrointestinal dysfunction: overeating, eating spicy food often leads to gastrointestinal dysfunction, indigestion, abdominal distension, abdominal pain, nausea and vomiting and other symptoms, as well as standing tummy ache lying down does not hurt. 2. Inflammation of the abdominal organs: Inflammation of the abdominal organs, lying down when the abdominal muscles are in a relaxed state, will not stimulate the peritoneum, standing up may stimulate the peritoneum, the appearance of small tummy ache, including chronic appendicitis, cholecystitis, etc., need to actively seek medical treatment, active treatment of the original disease. Standing small stomach pain lying down does not hurt, may also be due to other reasons, it is recommended that timely medical treatment, under the guidance of the doctor, so as not to affect the health of the body.