The location of left rib pain is mostly located on the lateral side of the ribs, a small portion is located on the inner surface of the ribs, and a very small portion is located on the ribs themselves. 1. Most of the left rib pain is involving pain, which is commonly caused by neuromuscular functional lesions of the left chest wall, chest wall soft tissue contusion or infection, chondritis, intercostal neuritis, abdominal organs such as gastric ulcer, pancreatitis and other lesions involving pain, and the pain is mostly located on the lateral side of the rib cage. 2. Intrathoracic diseases, such as lung infection, pleurisy, lung cancer, etc., can cause left rib pain, and the pain is mostly located in the inner surface of the rib cage. 3. Ribs itself lesions such as rib fractures, rib tumors, etc. pain is located in the ribs, pressure on the ribs can significantly aggravate the pain. It is recommended to go to the hospital for further examination and consultation to find out where the left rib pain is located.