Patients with gastric mucosal injury may have symptoms such as abdominal pain, loss of appetite and acid reflux. Different causes of gastric mucous membrane injury, corresponding to the clinical symptoms are different. 1. Damage to gastric mucosa caused by excessive secretion of gastric acid: patients may have symptoms such as distension and pain in the upper abdomen, acid reflux and so on. If the gastric mucosa is damaged due to bile reflux, it may induce abdominal pain, heartburn, bitter mouth and other symptoms. 2. Eating too much rough food damages the gastric mucosa: patients may have symptoms such as loss of appetite, stomach pain, stomach fullness and so on. 3. Bile reflux leads to gastric mucous membrane damage: patients may have abdominal pain, heartburn and other symptoms. It is suggested that patients with gastric mucosal damage can go to the hospital for gastroscopy and other examinations to find out the causes of gastric mucosal damage, and then carry out corresponding treatments according to the causes, and take gastric mucosal protective agents such as omeprazole and lansoprazole according to the doctor’s instructions, so as to avoid delaying the condition.