The heat of the day wheezing effort chest tightness is generally considered to be related to cardiovascular disease, respiratory diseases, mental and emotional factors. 1. Cardiovascular diseases: such as coronary heart disease, hypertrophic cardiomyopathy, etc., when the weather is hot, the patient’s peripheral vasodilatation, the amount of return blood to reduce the heart ejection of blood is insufficient, there will be tightness in the chest, the symptoms of asthma. 2. Respiratory diseases: such as emphysema, bronchial asthma, pulmonary embolism, etc., when the weather is hot, the oxygen content in the air decreases, coupled with pulmonary dysfunction, the body’s intake of oxygen is reduced, there will be chest tightness, shortness of breath symptoms. 3. Mental and emotional factors: the hot weather itself will cause emotional upset, coupled with the decline in oxygen content in the air, leading to emotional disorders, chest tightness, shortness of breath. If patients have symptoms of chest tightness and shortness of breath when the weather is hot, it is recommended to go to the hospital to identify the cause of the disease and then treat it.