The hidden pain inside the rib cage under the left chest can be caused by a variety of reasons, in addition to the rib cage itself, there may also be lesions of the pleura, lungs and heart, which can cause people to feel pain inside the rib cage. The initial judgment can be based on the accompanying symptoms, and no improvement after rest should promptly seek medical examination to confirm the diagnosis: 1, acute thoracic rib pain: commonly known as forked breath, can be caused by strenuous activities, sudden posture changes, manifested as the left lower rib pain, can follow the breathing rate of pain, can be relieved by massage, hot compresses, slow breathing; 2, pleurisy: the left pleura inflammation can be manifested as the left lower rib pain, often accompanied by cough, fever, breathing difficulties and other symptoms. fever, dyspnea and other symptoms. Coughing can aggravate the pain, and pressing hard or holding the breath will reduce the pain condition. Mainly caused by bacterial infection, according to the pathogenic bacteria to choose antibiotics, need to comply with medical advice, severe pain, you can use aspirin, ibuprofen, etc. to relieve pain; 3, rib chondritis: heavy work strain, trauma and other reasons may lead to the formation of acute injury to the rib cartilage, common can be manifested as the left rib below the hidden pain, pressure, cough pain is obvious. Analgesic and anti-inflammatory treatment, if necessary, glucocorticoid local closure treatment; 4, pneumonia: inflammation of the left lower lung triggered by pathogenic microorganisms, can be manifested as the symptoms of hidden pain below the left ribs, often accompanied by fever, cough symptoms. Need to use antibiotics under the guidance of a doctor, in serious cases, intravenous infusion of antibiotics to achieve rapid anti-inflammatory effect, accompanied by fever symptoms with the use of antipyretic drugs, such as oral ibuprofen, or intravenous infusion of lysergic acid; 5, coronary heart disease: mostly caused by atherosclerosis, coronary ischemia can cause patients with chest pain, mostly in the precordial area, can be radiated to the left limb, some patients pain location is not typical, can Some patients with atypical pain location can show localized hidden pain inside the rib cage, and can take medication as prescribed by the doctor according to the severity of the disease, or undergo stenting surgery, etc.; 6, other: some other lung and heart diseases, as well as diseases of the abdominal organs such as the pancreas, and female breast diseases can also show hidden pain inside the rib cage below the left chest, local soft tissue or bone injuries caused by trauma, and spinal lesions such as thoracic spine tuberculosis and thoracic spine osteophytes are also possible The specific causes should be combined with other manifestations and relevant auxiliary examinations to determine and treat the cause.