The causes of pain below the left rib cage include costochondritis, pleurisy, trauma, etc. It is necessary to clarify the cause of the disease and then treat the cause of the disease, such as taking painkillers, antibiotics, nutritive nerve medication to improve the symptoms. 1. Costal chondritis: painkillers such as aspirin, diclofenac sodium, ibuprofen, etc. can be used to relieve pain. 2. Pleurisy: you can take antibiotics such as penicillin, erythromycin, azithromycin and other drugs to control inflammation and improve symptoms. 3. Trauma: Nutritional nerve drugs such as vitamin B12, methylcobalamin and other drugs can be taken to promote the recovery of damaged nerves. Due to the individual differences and the diversity of causes, the drug does not have the absolute safest, need to choose the most suitable for their own drugs under the guidance of the doctor, the emergence of adverse reactions to timely medical treatment, drug allergy is prohibited. There may be other reasons for the pain below the left rib cage, it is recommended to go to the hospital in time to identify the cause of the disease, and actively cooperate with the doctor to receive standardized treatment to improve the prognosis of the disease.