Brain fog is very common in the clinic, most of the cases may be due to poor sleep, brain overuse caused by this situation has obvious triggers, the patient rest after the brain fog after the symptoms will be able to get complete relief. Part of the elderly patients will also be manifested as a frequent brain confusion, dizziness, drowsiness, this category of patients is mainly due to the formation of atherosclerosis of the cerebral arteries, resulting in brain tissue, brain cells in a chronic ischemia, hypoxia state, the emergence of the head of the head confusion, dizziness, drowsiness, memory loss and other symptoms, through the use of drugs to improve cerebral blood circulation can improve the symptoms, such as oral ginkgo ketone ester drop pills, Hemosiderin tablets. Many patients with vegetative nerve dysfunction, such as menopausal women with hormone metabolism disorders in the body, clinically manifested as head confusion, mental depression, sleep disorder symptoms.