There are many reasons for feeling tired, weak and wanting to sleep, such as poor sleep, low sleep quality at night or frequent late nights, short sleep time, during the day, the body will be in a tired and weak state, in a sleepy, wanting to sleep. There is also a part of the patient is caused by disease, such as those who have sleep apnea syndrome at night, and snoring more serious will also lead to the brain in a chronic state of oxygen deprivation, will show the body is more tired and weak, want to sleep. There are also patients with high-fat, high-viscosity blood, chronic lack of blood supply to the brain will also have this performance. There are also psychosomatic diseases, for example, many patients with depression, they will feel uninspired during the day, their bodies are weak and tired, and they want to sleep.