Normally, chest tightness is a symptom in the clinic. However, people with chest tightness have some other symptomatic manifestations, such as dyspnea, cough, etc., which need to be analyzed specifically. Most of them are caused by lung, heart or chest diseases, such as lung infection, coronary heart disease, pneumothorax, etc. When chest tightness occurs in the organism, some of them appear the above mentioned symptoms in the case of exercise, exertion, etc., but some of them appear in the case of sitting and resting, which is mainly related to the severity of the disease. Chest tightness is usually accompanied by labored breathing and chest pain. In addition, people with chest tightness may also experience coughing, sputum, radiating pain in the back of the shoulders and other accompanying symptoms, which are related to the characteristics of the different disease manifestations. After the chest tightness, it is recommended to go to the regular hospital in time, with the help of doctors to clarify the diagnosis, and actively accept the treatment, so as to avoid delaying the condition.