Hidden pain inside the ribs on the left side of the stomach is considered to be spleen damage, subphrenic abscess or intercostal neuritis. 1. The spleen is located in the left side of the abdominal cavity, it is also one of the most easily damaged organs, external impact is often the main cause of damage to the spleen, which can be manifested as acute hemorrhagic shock, pain at the site of the injury, limited abdominal wall swelling and tenderness, and can also be seen in subcutaneous ecchymosis and other conditions. This situation requires prompt resuscitation and, if necessary, removal of the spleen. The above operations should be carried out under the guidance of specialized doctors. 2. Subphrenic abscess can cause persistent dull pain at the site of abscess, aggravate respiration, and even persistent high fever. This situation requires timely surgical treatment of abscess puncture and drainage, and antibiotic treatment (such as cephalosporins, etc.) The operation should be carried out under the guidance of a specialized doctor. 3. Intercostal neuritis can also cause pain in the rib area, but it is often a short-lived stabbing pain, which is often caused by overstrain or local inflammation, and requires reasonable rest and analgesic and anti-inflammatory drugs (e.g., ibuprofen, etc.). The above medications should be administered under the guidance of a medical professional. If the above situation occurs, please consult a doctor in time for reasonable and standardized treatment.