First of all, we have to clarify whether “unbearable” means “panic” or “chest tightness and chest pain”. If you are fast asleep and suddenly feel uncomfortable, you should consider that it is caused by incorrect sleeping position, such as lying on the flat or left side of the bed, too much pressure from life and work, mental stress, heart disease, such as myocardial ischemia, heart failure and other reasons. You should sit up immediately or take the right side lying position to see if there is any relief of symptoms. If the symptoms are still not relieved or aggravated, you should go to the Department of Cardiovascular Medicine of the regular public hospitals in time to do ECG, cardiac ultrasound, cardiac enzyme profile and other tests to make a clear diagnosis. If it is caused by the heart, it should be actively treated, so as not to delay the condition and make it worse. If cardiac causes are excluded, you can take Zhu Sha An Shen Pill, Heart Stabilizing Pellet, Gou Wei Su and nerve regulating drugs for treatment. Usually, we should combine work and rest, avoid exertion, avoid staying up late, avoid emotional excitement and mental tension, and avoid excessive pressure. Eat less dinner, not easy to overfill, eat a light, easy to digest diet, do not eat too greasy food, to quit smoking, alcohol, sleep as much as possible to take the right side of the lying position.