Pain in the lungs during running is due to the expansion of blood vessels in the lungs, strenuous exercise will accelerate its blood circulation, there may be different degrees of inflammatory secretions oozing out, such as lactic acid secretion and lead to pain. So this time you should stop running and walk slowly, and gradually wait for the heart rate to stabilize after resting properly, do not do strenuous exercise, and can drink some warm boiled water, juice to relieve the tension of the dilated blood vessels in the lungs. If the pain is more obvious, you can take the appropriate pain medication, such as Chinese patent medicines such as Yuanhu Pain Relieving Drops Pills and Xiao Chaihu Granules, and if necessary, take the appropriate analgesic western medicine such as ibuprofen.