Hidden pain in the stomach every night may be caused by peptic ulcer, chronic gastritis, gastric tumors, etc. It is recommended to consult a doctor in time to identify the cause and treat the symptoms. 1. Peptic ulcer: the disease is a chronic course, the patient will present chronic, rhythmic, cyclical epigastric pain, but also with acid reflux, heartburn, anemia and other symptoms, may be manifested in the stomach every night hidden pain. 2. Chronic gastritis: patients will have nausea, vomiting, abdominal distension, abdominal pain, loss of appetite, belching, burning pain and other symptoms, and it is likely to show a vague pain in the stomach every night. 3. Gastric tumor: patients will have nausea, vomiting, epigastric discomfort, abdominal mass, loss of appetite, vomiting blood, blood in stool, weight loss and other symptoms. It may then show a vague pain in the stomach every night. There are other reasons for the vague pain in the stomach every night, and it is recommended that the patient consult a doctor in time to clarify the cause of the disease and follow the doctor’s instructions to standardize the treatment, so as not to miss the condition.