Sleep drowsiness is related to poor sleep quality or cerebral artery blood supply deficiency, caused by the following main causes: 1, neurasthenia and long-term mental tension, overwork, neurasthenia will affect the quality of sleep resulting in shortened deep sleep time, sleep drowsiness symptoms due to lack of sleep; 2, anemia, can be divided into mild anemia, moderate anemia and severe anemia, anemia can cause cerebral artery blood supply deficiency The symptoms of cerebral artery blood supply deficiency can be caused by anemia, and the symptoms of sleep drowsiness can be aggravated by cerebral artery blood supply deficiency in the sleep state; 3, dyslipidemia, blood flow is slowed down in the sleep state, and if there is dyslipidemia, the blood flow is even slower and causes cerebral artery blood supply deficiency, and the symptoms of drowsiness are related to cerebral hypoxia.