Rib pain under the chest consider rib osteitis, angina, pleurisy, rib fracture, tumor and leukemia and other causes. 1. Costochondritis or costochondritis: aseptic inflammation, mostly hidden pain, hot compresses and local physical therapy. 2. Angina pectoris: manifested as pain in the precordial area or under the sternum, pressure sensation, lasting for three to five minutes, which can be relieved on its own or after taking nitroglycerin, and ST-T changes can be seen in electrocardiogram. 3. Pleurisy: pleurisy caused by infectious, tuberculous, cancerous and other reasons can cause anterior chest pain. 4. Rib fracture: rib fracture caused by trauma causes rib pain below the chest, which needs to be diagnosed by chest X-ray. 5. Tumor: primary bone tumor or bone metastasis such as lung cancer can cause rib pain under the chest, and perfect bone scan can confirm the diagnosis. 6. Leukemia: it can cause sternal pain, in addition, it can be accompanied by fever, nosebleed, enlarged lymph nodes and so on. If you have rib pain under the chest, it is recommended to consult a doctor in time and treat the cause under the guidance of a specialist.