The causes of abdominal pain can be categorized according to the location of the pain into epigastric, right epigastric, periumbilical, and lower abdominal pain, as follows. 1. Hidden pain in the upper abdomen: Hidden pain in the upper abdomen is usually caused by peptic ulcer or chronic gastritis, pancreatic diseases, etc., and often accompanied by acid reflux, belching (hiccups), abdominal distension and other symptoms. 2. Hidden pain in the right upper abdomen: patients with hidden pain in the right upper abdomen, common causes such as fatty liver or chronic hepatitis, inflammation stimulation of the patient’s hepatic peritoneum, resulting in hidden pain in the right upper abdomen, often accompanied by scleral yellow staining of the skin, loss of appetite and so on. 3. Hidden pain around the umbilicus: Hidden pain around the navel, the common cause is gastrointestinal dysfunction or small intestine and other parts of the disease, may be accompanied by the patient’s bowel movements, shape and other changes. 4. Hidden pain in the lower abdomen: hidden pain in the lower abdomen, need to consider gastrointestinal tumors or chronic colitis, etc., often accompanied by an increase in the number of bowel movements, and some patients may have mucous pus and blood stool or blood in the stool. For women also need to consider pelvic inflammatory disease, or adnexitis. There are many other reasons for the appearance of abdominal pain, the patient is best to go to the hospital for relevant examinations to clarify the cause, under the guidance of the doctor’s treatment.