The causes of poor sleep and heart discomfort are physiologic, insomnia, and heart disease. You can make self-adjustment, take medication, and consult a doctor in time. 1. Physiological: if recently overworked, emotional fluctuations, will briefly appear the instability of nerve function, such as insomnia, palpitations, etc., after sufficient rest can be improved. Normally, you should avoid staying up late, relax your body and mind, and pay attention to rest. 2. Insomnia: Insomnia will increase the degree of nerve arousal, resulting in poor sleep, palpitations and so on. You can take sedative-hypnotic drugs, such as oxazepam and zopiclone. Cognitive behavioral therapy for insomnia is also available. 3. Heart disease: Suffering from heart disease can lead to arrhythmia, palpitation, chest tightness, wheezing, which affects sleep. You can take metoprolol, furosemide, hydrochlorothiazide, nifedipine, etc. to treat heart disease. If it happens frequently you should go to the hospital.