Left chest a point a burst of pain is mainly considered and local tissue condition abnormalities related to the causes of the corresponding lesions mainly include coronary heart disease, costochondritis, lung disease, breast disease and so on. 1. Coronary heart disease: mainly because of the coronary artery stenosis caused by the local blood supply is insufficient, there will be a corresponding part of the pain discomfort symptoms, usually accompanied by radiating pain. 2. Costochondritis: related to infection, trauma and other reasons, local tissue stimulation can also cause pain and discomfort. 3. Lung diseases: including pneumonia, pleurisy, tumor stimulation to the adjacent pleura, affecting the nerves, can also cause local paroxysmal pain. 4. Breast diseases: mainly including breast hyperplasia, fibroadenoma and breast cancer, etc., can cause local nerve stimulation, causing pain and discomfort. If you have a pain in the left breast, you need to consult a doctor in time and take standardized treatment under the guidance of the clinician.