Patients feel pain on the right posterior side of the body, which is usually caused by a variety of reasons, mainly the following: 1. Patients suffer from diseases of the digestive system, such as cholecystitis, acute hepatitis, peritonitis and other diseases. When the patient suffers from acute gastroenteritis, which leads to excessive secretion of gastric acid, the pain on the right posterior side of the body will also occur. When patients have gastroesophageal varices, right posterior pain may also occur.2. Patients with respiratory system diseases, such as right pleural effusion, right-sided tension pneumothorax, right-sided pleurisy, etc.3. Patients with urinary system diseases, such as right-sided kidney or ureteral stones, especially low stenosis stones.4. When patients with acute appendicitis or acute diffuse peritonitis, all may lead to right posterior body pain. 5.If the patient is female, she may suffer from gynecological system diseases, such as right adnexitis, ovarian cyst, tubal inflammation, ectopic pregnancy, etc. 6.Patients suffer from right posterior trauma or sprain and other reasons, if the symptoms of right posterior pain appear, it is recommended to consult a doctor promptly.