Chest tightness and irritability all day long can be divided into physiological and pathological, and the pathological causes include cardiovascular diseases, psychological diseases and respiratory diseases. 1. Physiological: If the recent mood swings, or sleep quality is not good, it is possible to produce this phenomenon, which is a normal physiological phenomenon, as long as the mood or rest and relaxation can be restored to normal, without additional special treatment. 2. Pathological: cardiovascular disease is one of the common causes of such symptoms, such as coronary heart disease, heart failure and pulmonary heart disease, etc., these diseases because of the decline in cardiac function and thus produce symptoms of chest tightness followed by irritability; depression and anxiety disorders and other psychological disorders can also produce this symptom; respiratory diseases, such as bronchitis and pneumonia, can be due to breathlessness to produce this symptom. If you suspect that the symptoms are pathologic, it is recommended that you go to the hospital in a timely manner.