The position of the left side of the lower part of the raphe is the stomach, and the hidden pain may be caused by acute gastritis, gastric ulcer and other reasons. 1. Acute gastritis: it may be acute gastric mucosal inflammation caused by acute stress, drugs, infection, bile reflux, improper lifestyle, etc. It mainly manifests itself as vague pain on the left side of the lower part of the raphe, epigastric distension, feeling of fullness after a small amount of food, nausea, vomiting and other symptoms, which can be treated with magnesium alumina carbonate, omeprazole, cimetidine and other drugs. 2. Gastric ulcer: it may be caused by the infection of Helicobacter pylori, gastric acid and pepsin digestion itself, gastric ulcer, there will be a hidden pain below the raphe, acid reflux, abdominal distension and other symptoms, can be treated by amoxicillin, Ranitidine, Clavulanic acid potassium and other medications, if the effect of medication is not good, may need surgical treatment. There may be other reasons for the left-sided hidden pain below the raphe, and the symptoms continue to be unrelieved should go to the hospital as soon as possible to clarify the cause of the disease, and standardized treatment under the guidance of the doctor.