The reasons are as follows: 1. Patients with anemia are often seen with inadequate iron supplementation or chronic blood loss, manifested by pallor, panic and weakness, dizziness, memory loss, etc. Routine blood tests often indicate a decrease in red blood cells and hemoglobin content. 2. The lack of sufficient energy metabolism in the body, long-term sleepiness can also be accompanied by lethargy, fatigue, body mass index significantly lower than the normal range. 3, anxiety and depression are mostly seen in female patients due to long-term mental stress or a major mental shock, manifested by depressed mood, reduced interest in the surrounding things, irritability, always feel the occurrence of adverse events. In addition to being sleepy all the time, it can also be seen at the change of seasons and after eating.