The organ corresponding to pain in the body generally refers to whether the occurrence of pain in certain areas is related to some internal disease. These pains may be caused by internal diseases that directly stimulate the nerves, or they may be involved or radiating pains. For example, left shoulder pain may be caused by coronary heart disease. 1. Direct stimulation: pain caused by direct stimulation of internal organ diseases is mostly located on the surface of the body in the neighboring organs, for example, acute cholecystitis can appear right upper abdominal pain, acute appendicitis can appear right lower abdominal pain, acute pancreatitis is more often manifested as the left middle-upper abdominal pain, coronary artery disease is more often manifested as anterior cardiac region or posterior sternal pain, and so on. 2. Involvement pain: the pain site of involvement pain is far away from the primary lesion, for example, acute cholecystitis can appear right shoulder pain, coronary artery disease can appear left shoulder or left upper limb pain, renal pelvis stone can cause lumbar, inguinal and even genital pain, diaphragmatic abscess can appear right shoulder radiating pain, and so on. 3. Radiating pain: when the spinal nerve roots or nerve trunks have lesions, pain radiating along the nerve course to the endings can occur. For example, sciatic nerve root compression caused by lumbar intervertebral disc herniation manifests itself as pain that is transmitted from the lumbar buttocks along the back of the thighs and reaches the outside of the calf, the back of the foot or the toes. Once the symptoms of pain appear, please consult a doctor in time to avoid delaying the condition.