Knocking on the back feeling visceral pain may be the manifestation of involved pain, can be caused by heart disease, gastroduodenal disease, pancreatic disease, vertebral disease and other factors. 1. Heart disease: when coronary heart disease, angina pectoris and other heart diseases, may appear in the back of the radioactive pain symptoms, accompanied by back tightness and other discomfort. 2. Gastroduodenal diseases: peptic ulcers occurring in the gastroduodenal region, especially those in the duodenal bulb, can lead to pain in the back due to its retroperitoneal position, and pain in the internal organs can be felt when knocking on the back. 3. Pancreatic diseases: Acute pancreatitis, pancreatic tumors and other pancreatic diseases can cause involving pain in the back, and visceral pain can be felt when knocking the back. 4. Vertebral diseases: Tumors occurring in the vertebral body or other parts of the tumor bone metastasis to this place can radiate to the back and cause pain symptoms, and when knocking on the back of the vertebral body, there can be pain in the internal organs. When the visceral pain occurs when knocking the back, it may be caused by excessive strength, if the pain occurs even when resting, it is necessary to consult the doctor in time and take appropriate treatment under the guidance of the specialized doctor.