There are many reasons for old confusion and want to sleep, the common causes are mainly the following: First, cerebral artery blood supply deficiency, the disease is due to atherosclerosis caused by the decline in vascular elasticity, lumen narrowing, causing a relative reduction in blood flow through the head per unit of time, resulting in cerebral ischemia and hypoxia, resulting in head confusion, drowsiness, memory loss, dizziness and other clinical manifestations. The second is iron deficiency anemia, which is caused by the decrease of peripheral blood cells and the decrease of the body’s oxygen-carrying capacity, resulting in pallor, confusion, drowsiness, dizziness and other clinical manifestations, and can be treated with ferrous sulfate. Thirdly, phytodystrophy, which is mostly seen in menopausal women, is caused by the disorder of hormone secretion in the body, mainly manifested as drowsiness, weakness, dizziness, confusion and other clinical manifestations.