1, caused by poor rest
Of course, it is not necessarily disease that causes drowsiness. Many people think that this will only happen to the elderly. Actually, not necessarily, because young people now work long hours and are under greater pressure. In addition, long working hours, lack of exercise, staying up late or chasing plays will all lead to poor rest. Therefore, if this goes on for a long time, it will lead to the disorder of the body's biological clock, and the body will not get enough rest, which will lead to drowsiness and listlessness.
2, due to physical weakness
Why is it that now that living conditions are good, everyone's health is not as good as that of the old people in the past? In fact, in the final analysis, there is still a lack of exercise. The human body is a very complicated body, and daily diet and living habits have a great influence on health. The weak constitution here does not mean that they don't have enough nutrition, but that they are not strong, and sometimes overnutrition is not necessarily healthy. So in general, we should strengthen exercise and relax, so that their spirits will be better and they will not appear.
3, caused by physical illness
Of course, if no disease is the best, I am most afraid of mental fatigue caused by some pathological reasons, such as common mental diseases, cardiovascular and cerebrovascular diseases and other pathologies. In this case, if you want to control it, you need to start from the pathological aspect, because daily use of some drugs may make your body feel sleepy. So we should discuss it according to the situation.