Hidden pain in the right side of the stomach is commonly caused by the following reasons: firstly, diseases in the liver and biliary system, such as hepatitis, cirrhosis, liver tumor, cholecystitis, gallbladder stones, gallbladder cancer, bile duct cancer, etc., which will cause hidden pain in the right upper abdomen. Second, gastrointestinal dysfunction, the patient will have hidden pain in the right side of the umbilicus, often accompanied by abdominal distension, and even with nausea, belching. Third, the right side of the colon disease, such as colitis, colon tumor, etc., in addition to pain, there will be diarrhea and blood in the stool. Fourth, appendix disease, such as appendicitis, appendix tumor and so on. Fifth, the right adnexal disease, such as adnexitis, adnexal tumor and so on. It is recommended that patients go to the hospital in time, and need to complete the relevant examinations, such as blood routine, urine routine, stool routine, ultrasound, colonoscopy, etc., to be able to clarify the cause, and then you can carry out the appropriate treatment.