The main reasons for chest pain when exerting force include the following: first, due to costochondritis. Costochondritis is an aseptic inflammation of the rib cartilage, mostly due to long-term lifting of the upper limbs, or lifting heavy objects, etc., resulting in soft tissue strain on the rib cartilage, which in turn causes costochondritis. The second aspect is caused by strain on the soft tissues of the chest. Mostly due to the usual inattention to exercise, or physical exercise without warming up, resulting in chest muscle strain caused. The third aspect is caused by respiratory system diseases. Mostly due to acute and chronic bronchitis, rupture of alveoli causing spontaneous pneumothorax and other causes of chest pain after exertion, which will be accompanied by respiratory system performance such as breathlessness. The fourth aspect is caused by cardiovascular system diseases. The pain after chest exertion caused by angina pectoris or myocardial strain, etc. can be clarified by electrocardiogram or cardiac ultrasound, as well as dynamic electrocardiogram. There are many causes of pain after exertion in the chest, and timely hospital consultation is needed to clarify the cause.