Men who are suddenly particularly drowsy should be careful that it is caused by lack of oxygen to the brain. If the environment is too closed and there is no air circulation, it is easy for the body to suddenly become particularly drowsy at this time. In addition, we should pay attention to whether the work and study pressure is too high, resulting in insufficient rest, and at the same time prone to day and night reversal, the human body is prone to special drowsiness. Of course, some pathological diseases should be excluded, such as anemia, which can lead to a decrease in the oxygen absorption capacity of hemoglobin, and the body is prone to special drowsiness at this time. Some hypotension or intracranial diseases can also cause sudden drowsiness, so if necessary, further consultation with the neurology department can be made. Some systemic diseases should also be ruled out, such as hypothyroidism, in which the lack of thyroid hormones in the body can lead to drowsiness and coldness.