The causes of shortness of breath and tightness of chest always wanting to take a deep breath are divided into physiological causes and pathological causes, and need to be based on the specific causes of the targeted selection of treatment programs. 1. Physiological reasons: usually if you are in the environment of oxygen deficiency for a long time, or mental stress, lack of sleep and rest, emotional depression and excessive fatigue, it is easy to produce shortness of breath, chest tightness and always want to take a deep breath of symptoms, generally through self-regulation can be recovered on their own, and is not caused by physical disease. 2. Pathological causes: if there are respiratory diseases, such as bronchitis, asthma, tumors, etc., easy to trigger shortness of breath and chest tightness always want to deep breath symptoms, if there is cardiac insufficiency or anemia, is also easy to trigger shortness of breath and chest tightness always want to breathe performance. If the symptoms last for a long time or have frequent attacks, it can not be ruled out that they are related to pathological factors, and need to be examined as soon as possible to confirm the diagnosis, and then carry out standardized treatment.