Patients with symptoms of chest pain when stretching: Firstly, there is a possibility that muscle strain was caused during excessive stretching, so that the symptoms of chest muscle pain may occur. Secondly, there is a possibility that the patient is suffering from costochondritis, the most common form of costochondritis is non-specific costochondritis, which occurs in young women, and the patient often has pain in the costochondral bone next to the sternum, and the local pressure pain is more obvious, and the patient may experience increased pain when coughing, deep breathing, or strenuous activity, and it is easy to recur. Then the chest pain may also be caused by spontaneous pneumothorax when stretching, especially in long and lean body type, when over activity, it may cause spontaneous pneumothorax, which can also appear the symptom of chest pain, and can be accompanied by dyspnea, general sweating and other symptoms. There is also chest pain may be intercostal neuritis caused by herpes zoster, such as a relatively low immunity, infection with the herpes zoster virus can appear intercostal neuralgia. This situation needs to pay attention to rest, avoid strain, in addition to take some oral anti-inflammatory pain medication to symptomatic treatment, such as symptoms can not improve, but also need to go to the hospital for further examination.