Hidden pain in the stomach may be a sign of gastritis, peptic ulcer, appendicitis and other diseases. 1. Gastritis: Most of the gastritis is caused by irregular daily diet and irritation of the stomach. For example, the main symptoms of acute simple gastritis are vague pain in the stomach, fullness, loss of appetite, nausea and vomiting. 2. Peptic ulcer: Peptic ulcer is an ulcer caused by the mucous membrane of the gastrointestinal tract being digested by stomach acid or pepsin itself. It may also cause hidden pain in the stomach, but each patient is different, so the exact manifestation of the pain will be different. 3. Appendicitis: In the early stage of appendicitis, when the inflammation is in the mucous membrane layer or submucous layer of the appendix, the symptom of hidden pain in the stomach will appear. Hidden pain in the stomach can also be seen in other diseases, such as cholecystitis, pancreatitis, intestinal obstruction, chronic enteritis, gastrointestinal tumors, urinary stones, ectopic pregnancy and other diseases, it is recommended to consult a doctor in time, as soon as possible to identify the cause of the treatment.