Back pain after gastroscopy is mainly related to gastric mucous membrane damage, gastritis and other diseases. 1. Gastric mucous membrane damage: gastroscopy is an invasive examination results in gastroscopy, may stimulate, damage the gastric mucous membrane, resulting in excessive secretion of gastric acid, and then appear stomach pain, acid reflux, and even back pain symptoms. 2. Gastritis: patients themselves have gastritis and other diseases, stimulation during gastroscopy can cause acute attacks, and then appear stomach pain, back pain and other uncomfortable symptoms. 3. Other diseases: In addition to the above, the possibility of lumbar disc herniation, cervical spondylosis and other diseases should also be considered, resulting in back pain and other symptoms. If you have symptoms of back pain, you should consult a doctor in time to confirm the diagnosis of your condition and follow the doctor’s instructions for treatment.