The irregular hidden pain from the navel to the xiphoid process may be caused by gastric ulcer, pancreatitis, gastritis, appendicitis, trauma and other diseases. 1. Gastric ulcer: patients with gastric ulcer will experience burning pain in the stomach, and if the condition worsens, it may also induce hidden pain in the middle of the umbilicus and navel. 2. Pancreatitis: Patients with pancreatitis may experience pain in the epigastrium or abdomen, especially after eating, and may be accompanied by nausea, vomiting, and fever. 3. Gastritis: After the attack of gastritis, the patient will have stomach pain, nausea and vomiting, and pain in the lower abdomen, as well as hidden pain in the navel and the middle part of the raphe. 4. Appendicitis: appendicitis in the early stages of the onset of pain, usually for the raphe area, with the development of the disease, will gradually transfer to the navel around, and then down to the abdominal pain. 5. Trauma: If the patient’s sternum is squeezed or collided, it may lead to sternal injuries, and pain will appear in the patient’s chest and navel and other parts of the body. Because of the causes are more, it is recommended that the patient actively consult the doctor, with the doctor to do a systematic examination to confirm the diagnosis.