Always sleep most of the time because of sleep deprivation, and the causes of sleep deprivation, mainly consider the following three situations: First, bad habits, such as irregular life, irregular rest, staying up late, drinking alcohol, eating excessively greasy food before bedtime, can cause the brain to sleep at night can not be fully rested, so the brain is still in a fatigue state. There are also obese patients who sleep at night with “snoring”, which can cause a brief apnea, while the high viscosity of blood, resulting in brain cells ischemia, lack of oxygen, drowsiness, drowsiness during the day. Second, certain disease states, such as hypotension, before and after menopause, cerebrovascular disease and other such diseases may cause insufficient blood supply to the brain, thus leading to drowsiness. Certain diseases taking drugs can also cause drowsiness, such as cold medicine with paracetamol ingredients, sedative drugs can lead to want to sleep. Third, mental factors, long-term psychological stress, family disharmony, anxiety and insomnia, depression, etc., resulting in long-term sleep deprivation, the body and brain in a state of fatigue.