There are organs such as lungs, heart and stomach, as well as pleura, nerves and blood vessels distributed below the left rib cage, and the hidden pain below the left rib cage may be caused by injuries to the above organs and tissues, and is not limited to the so-called four diseases. Pleurisy, etc. can cause hidden pain below the left side of the ribs, and patients usually feel the pain more obviously when they breathe; 2, gastric lesions: chronic inflammation and ulcers in the cardia area of the stomach and the left side of the gastric body usually also show symptoms of hidden pain below the left side of the ribs, and most patients also have a loss of appetite, nausea, vomiting and other symptoms; 3, pulmonary lesions: pathogenic microorganisms caused by the left side of the Pulmonary diseases such as lung infection, bronchial dilatation, tuberculosis, etc. may also show symptoms such as hidden pain under the left side of the ribs, coughing, coughing, etc.; 4, cardiac lesions: patients with heart failure, myocardial strain, coronary heart disease, pulmonary heart disease, etc. generally also show hidden pain under the left side of the ribs, accompanied by chest tightness, panic, shortness of breath, etc.; 5, other: localized herpes zoster under the left side of the ribs Infection, intercostal neuritis, costochondritis and other diseases may also lead to hidden pain below the left rib cage. There are many causes of hidden pain below the left side of the rib cage, so it is recommended that patients with the above symptoms go to the hospital for regular treatment with relevant examination to avoid missing the time for treatment.