The causes of inexplicable discomfort while sleeping include poor sleeping environment, insomnia, and somatic diseases. 1. Poor sleeping environment: If the temperature and humidity are not suitable, too much noise and light during sleep, doing a lot of exercise before going to bed, eating too much greasy food, all of them will lead to poor quality of sleep. 2. Insomnia: Suffering from insomnia will cause difficulty in maintaining sleep, waking up frequently, affecting sleep, and will be uncomfortable. 3. Somatic diseases: arthritis, systemic lupus erythematosus and other joint lesions, sleep apnea syndrome, chronic heart failure, anemia, hypertension and other diseases will have sleep problems. Should consult the doctor in time, clear diagnosis, targeted treatment.