There are many causes of drowsiness and dizziness, 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, resulting in insufficient blood supply to the brain, cerebral ischemia, hypoxia, resulting in dizziness, drowsiness, memory loss and other symptoms, taking drugs such as ginkgo biloba can symptomatically relieve symptoms. Secondly, iron deficiency anemia, which is mostly seen in menopausal women due to the disruption of hormone secretion in the body, mainly manifests as pallor, dizziness, sleepiness, weakness of the limbs and other symptoms, and can be clearly diagnosed by improving routine blood tests, and can be relieved by taking ferrous sulfate. Third, hypoglycemia, the disease is mostly seen in the fasting state, mainly manifested as cold limbs, dizziness and sleepiness, mental lethargy and other clinical manifestations, improve the blood sugar test results to make a clear diagnosis, and can effectively relieve the symptoms after eating immediately.