Most of early stomach cancer patients have no symptoms, and left rib pain has no correlation with early stomach cancer. Generally speaking, the common causes of rib pain include costochondritis, pleurisy, etc. Meanwhile, we should also exclude whether there is any heart problem, so it is recommended to go to the hospital for further investigation. 1. Costochondritis, left rib pain of stomach cancer patients may be caused by inflammation of rib cartilage due to low immune function. Costochondritis mainly manifests as pain in front of chest, which may radiate to the back or abdomen, and pressure on rib cartilage may cause pressure pain. 2. Pleurisy, the patient’s main symptoms are chest pain, chest tightness, often in deep coughing, the pain is often in the pleurisy site. 3. Heart disease, if the patient has left rib pain, it may also be related to heart disease, such as coronary heart disease patients with angina pectoris, can be manifested as pain around the left rib. Patients with left rib pain, may also be due to herpes zoster, gastric diseases such as reflux esophagitis, etc., it is recommended to improve the relevant examinations in a timely manner, to further clarify the causes of pain, under the guidance of the doctor for treatment.