Pain under the left side of the rib cage without pain on pressure may be related to costochondritis, limited pleurisy, intercostal neuralgia and other conditions. 1. Costal chondritis: patients with costal chondritis will have pain in the rib area, but the location of the pain is relatively limited, usually aggravated after exertion or strenuous activities, and accompanied by obvious swelling. 2. Restricted pleurisy: patients mainly manifest persistent chest pain, which may radiate to the scapula, neck, abdomen and ribs, and the pain will be aggravated when coughing. 3. Intercostal neuralgia: the typical symptoms of intercostal neuralgia are pain in the chest and back area, chest, abdomen, forearm midline and other parts of the chest and abdomen, usually a vague pain below the ribs. It is recommended that the patient consult the doctor in time, improve the examination, and clarify the cause of the disease.