ST segment changes in young people, caused by physiological factors, are usually not serious, while those caused by pathological factors such as myocarditis and hypokalemia are more serious. 1. Physiological factors: Usually, young people have high pressure in life, irregular work and rest, and stay up late for a long time, which may cause chest tightness and other discomforts, and at the same time, the ECG will indicate ST segment changes; after improving the life style, the symptoms of ST segment changes in the ECG will return to normal, which is caused by physiological factors, and there is no need to take special treatment. 2. Myocarditis: usually due to viral infection, autoimmunity decline, physical and chemical factors, etc., myocardial cells of young people are affected by inflammatory lesions, so that symptoms such as arrhythmia and ST-segment changes in electrocardiogram can be found during electrocardiogram examination. 3. Hypokalemia: If young people eat unclean food in their daily life, it may lead to acute gastroenteritis, which may cause vomiting, diarrhea and other discomforts, resulting in excessive loss of body fluids and electrolyte disorders, and hypokalemia may occur, which may be manifested as ST-segment changes on electrocardiogram. 4. Myocardial infarction: As the age group of myocardial infarction is getting younger and younger nowadays, young people may have symptoms of myocardial ischemia and hypoxia after working late at night for a long period of time, which may be manifested as ST-segment elevation in electrocardiogram examination. When the above symptoms appear, go to the hospital in time, early standardized treatment, to avoid delaying the best treatment time.