Lung pain after running can be caused by three main types of reasons, such as not doing warm-up exercises, getting cold, and pneumothorax. Specific recommendations to the hospital to do the appropriate examination to determine the cause of the disease. Specific instructions are as follows: 1. Running will produce a certain stimulation of the chest, and if you do not warm up before running, it may cause the pulling of lung tissue, pleura and other structures, leading to the appearance of pain symptoms. Generally the pain symptoms will be significantly relieved after rest. 2. Running and other strenuous exercise will produce a lot of sweat, this time the body’s immunity is relatively poor, easy to get cold, produce some inflammatory exudate material to stimulate the pleura, leading to the emergence of pain symptoms. Therefore, before exercise to do their own protection, do not wear too little, to avoid catching cold. 3. Running and other sports may lead to the rupture of alveoli, resulting in pneumothorax that compresses the lung tissue and causes pain. You can go to the hospital for a chest CT to make a clear diagnosis and then undergo surgery as needed. If there is pain in the lungs after running and the symptoms continue without relief, it needs to be taken seriously, and you need to go to the hospital as soon as possible for further examination to clarify the cause of the disease.