Hidden pain in the left rib cage may be caused by intercostal neuritis, costochondritis, pleurisy, etc. It can be treated with oral non-steroidal anti-inflammatory drugs, nutritive nerve drugs and antibiotics. 1. Intercostal neuritis: when there is a viral infection, thoracic spine degeneration and other diseases, intercostal nerve compression leads to intercostal nerve inflammatory reaction, pain, oral ibuprofen analgesic treatment, there may be nausea, vomiting, blurred vision and other adverse reactions, allergy is contraindicated; oral methylcobalamin nutritional nerve, may cause nausea, diarrhea and other adverse reactions, allergy is contraindicated. 2. Costochondritis: viral infections, endocrine abnormalities caused by nutritional disorders of the costal cartilage chest wall swelling, pain in the ribs, diclofenac sodium extended-release capsules anti-inflammatory and analgesic, may cause gastrointestinal discomfort, rash, edema, allergy, severe heart failure is prohibited; the use of amoxicillin capsule to control the infection, diarrhea, skin rash, allergy is prohibited. 3. Pleurisy: various pathogenic bacteria lead to pleural inflammation caused by fever, chest pain, pain inside the left side of the ribs, often accompanied by pleural effusion, cephalosporins can be used as anti-infective treatment, such as cefixime capsules, may appear gastrointestinal discomfort, allergies, blood disorders, allergy is prohibited. If there is a hidden pain in the left side of the ribs, it is recommended to go to the hospital in time to find out the cause and then treat the symptoms. Drugs need to be used under the guidance of a doctor, avoid self-medication.