The symptoms of abdominal pain occur when the patient lies down and can be relieved when he sits up, which may be caused by some intestinal diseases, such as acute enteritis or ulcerative colitis can occur abdominal pain symptoms. In addition, if you suffer from irritable bowel syndrome and other intestinal disorders, you may also experience abdominal pain. In addition, there may be nausea, vomiting, diarrhea, this situation, there may be suffering from pancreatitis, suffering from acute pancreatitis, due to pancreatic edema, bleeding, necrosis, there may be abdominal pain, abdominal distension, nausea, vomiting symptoms. The pain is usually severe, and may be heavier when lying down, and may be reduced when sitting or sitting forward. Therefore, this situation, you need to go to the hospital for further examination, you can carry out abdominal ultrasound or abdominal CT examination, and also need to check the blood routine, serum amylase, in addition to the examination of enteroscopy in order to clarify the diagnosis, and to carry out targeted treatment.