Frequent hidden pain at the edge of the left side of the rib cage may be intercostal neuralgia, costochondritis, digestive system diseases and so on. 1. Intercostal neuralgia: this is the patient’s own subjective feelings, the disease is generally considered to be the thoracic spine degenerative disease, ligament thickening and other reasons for non-infectious diseases, can be improved by acupuncture, hot compresses, medication, etc., the drug can be selected from the methylcobalamin, gabapentin and so on. 2. Costochondritis: The most common form of costochondritis is non-specific costochondritis, which is caused by viral infection and thickening of ligaments. 3. Digestive system diseases: there are stomach and spleen in the area where the edge of the left side of the rib cage is located, and there can be pressure pain when pressing, usually there are gastric ulcer, duodenal ulcer, splenic rupture, etc., which need targeted medication, such as omeprazole, rabeprazole, etc., or surgical treatment. It is recommended to go to the thoracic surgery or gastrointestinal surgery in time for further examination, standardize the use of drugs after a clear diagnosis, and avoid blind use of drugs.