Chest pain after running needs to be judged according to the location and nature of the pain and the specific situation. If the breast pain is bilateral, it is considered to be caused by repeated strain on the suspensory ligaments of the breast during running. The breast gland is fixed to the fascia of the pectoral muscle by the suspensory ligaments of the breast, which is a connective tissue with relatively little elasticity. This situation can be relieved by resting and applying local heat very soon, usually try to wear more comfortable sports underwear when running. In addition, if the left side of the precordial pain, also consider the lack of exercise, after strenuous exercise, the heart transient myocardial ischemia caused by chest pain discomfort, if the symptoms can be quickly relieved after rest is not a big problem, if necessary, you need to go to the hospital for examination. If the usual lack of exercise, try to do gradual exercise, increase the cardiopulmonary function before starting strenuous activities.