Hallucinations before bedtime are mainly due to the following reasons: 1. If the patient is elderly and has hallucinations before bedtime and has an acute onset, hallucinations, hallucinations or recent abnormalities in mental behavior, or slurred speech, dizziness, etc., ask the patient if there is hypertension or diabetes, and then a cranial magnetic resonance examination is needed to find out if there is infarction or hemorrhage in the brain lobes. Some patients with lobe lesions can have psychiatric symptoms manifested as hallucinations, especially at night. 2, hallucinations before bedtime should ask the patient’s past medical history, whether there are liver diseases, such as hepatic encephalopathy, whether there are behavioral abnormalities, such as urination and defecation, some liver diseases in the hepatic encephalopathy stage can also appear psychiatric symptoms, manifested as hallucinations, there are also some patients, such as those with Uremia, in the late stage of uremic encephalopathy, also prone to psychiatric symptoms, manifested by hallucinations or hallucinations and hallucinations, mainly at night.