Confusion is mainly manifested as head drowsiness, lack of concentration, etc. It is mainly seen in the following etiologies: The most common cause of confusion is low mood, depression, etc. Patients with this disease appear to be in a bad mood, slow in thinking, feel like a paste in the mind, unclear thinking, confused, and are considered to be suffering from depression. It may be caused by the patient’s lack of sleep, such as long-term insomnia and dreaminess leading to low sleep quality, and during the daytime the patient will show a feeling of dizziness and confusion, lack of concentration, memory loss, and mental depression. It may also be the cause of neurasthenia, mainly manifested as easy fatigue, the patient also sleeps well, no emotional depression, but the patient has no obvious triggers, appear easy to exert, feel unrefreshed and confused. Cerebrovascular diseases lead to impaired blood circulation in the brain and easy disorientation. Some of them have sleep apnea, snoring and other problems that lead to lack of oxygen to the brain, and they also appear confused.