Standing stomach pain lying stomach does not hurt may be due to gastritis, gastric ptosis and gastric ulcer. 1. Gastritis: After the stomach secretes gastric juice, when the patient stands up, gastric acid is concentrated in the lesion area such as the gastric sinus, causing it to be stimulated by the inflammatory reaction, resulting in pain. When the patient lies down, the gastric acid is evenly distributed in the stomach, the gastric acid in the lesion area is reduced, and the pain is alleviated, resulting in the patient’s stomach hurting when standing and lying down, and the stomach doesn’t hurt. 2. Gastric ptosis: when the patient stands, the stomach will move downward due to the effect of gravity, aggravating the symptoms of gastric ptosis, resulting in pain, when the patient lies down, the effect of gravity disappears, the pain may be relieved or even disappeared, resulting in the patient’s standing stomach ache and lying stomach does not hurt. 3. Gastric ulcer: gastric ulcer is located in the gastric sinus, the great curvature of the stomach and other parts of the stomach, in standing stomach acid will gather in its parts, so it will cause pain in the stomach, lying down due to gravity changes, the location of gastric juices will also change, and the contact with the ulcer surface may be relatively less, the symptoms of pain in the stomach can be alleviated, resulting in the patient’s standing stomach aches and pains lying down the stomach does not hurt. If you have a standing stomach pain lying stomach does not hurt, it is recommended to go to the hospital in a timely manner, after a clear examination, according to the cause of targeted treatment.