The reason for being sleepy all the time may be related to lack of sleep, malnutrition, excessive stress, lack of exercise and many other reasons, what is the reason needs to be judged according to the situation. 1. lack of sleep: lack of sleep is the most common cause of sleepy all the time, mostly due to lack of sleep at night, such as many people do not go to bed on time due to the impact of work or lifestyle habits, resulting in insufficient sleep, the body is in a state of fatigue, the brain is not enough excitability, which will lead to sleepy feeling. 2. malnutrition: such as controlling the way the diet to reduce the intake of calories, or unhealthy diet, fruits, vegetables and other intake is insufficient, resulting in vitamins or lack of trace elements, or the lack of energy to provide, the metabolism slows down, which will lead to a decline in the brain’s supply of energy, the body is easy to fatigue and fatigue, the emergence of sleepy all the time want to sleep situation. 3. Excessive pressure: If you are in a high-pressure environment for a long time, your body and mind are in a state of tension for a long time, which can easily affect the quality of sleep and produce the feeling of being sleepy and wanting to sleep. 4. Lack of exercise: If you are often sedentary, it may lead to slower blood circulation, the body’s ability to supply oxygen, energy supply decline, may also lead to increased blood viscosity, physical decline, metabolism is reduced, the brain lack of oxygen, so sleepy and want to sleep. In addition, we should also exclude the possibility of episodic sleep disorder, sleep apnea syndrome and other diseases. When you are sleepy all the time and don’t get relief, you should consult a doctor in time to find out the cause and then treat it actively under the doctor’s guidance to avoid delaying your condition.