The st is considered to be the ST segment of the electrocardiogram. If it is a physiological change, it may be cured by itself; if it is a pathological change, it usually cannot be cured by itself. 1. Physiological changes: exercise, lack of sleep, emotional excitement, diet and other reasons may lead to physiological changes in the ST segment, chest tightness, shortness of breath, panic and other symptoms, remove the triggers can generally be self-healing. 2. Pathological changes: coronary atherosclerotic heart disease, myocarditis, myocardial infarction, hyperthyroidism, anemia and other diseases may lead to pathological elevation of the ST segment of the electrocardiogram, depression and other changes in the ST segment and chest tightness, shortness of breath, dizziness, fatigue, panic, etc., generally can not be self-cured. If ST-segment changes are shown on ECG, further examination of cardiac ultrasound, cardiac enzymes, thyroid function, blood routine and other items are needed to find out the cause, and if necessary, treatment should be carried out under the guidance of a doctor.