If there is a sound in the head when sleeping, we should consider chronic cerebral blood supply deficiency or long-term chronic anxiety, hallucinations, as follows: 1, if the sound in the head is birdsong, machine-like roar and tinnitus-like sound, medically known as cranial tinnitus, is caused by chronic cerebral blood supply deficiency or long-term chronic anxiety, mostly seen in middle-aged women and elderly patients, need to improve the cranial magnetic resonance and magnetic resonance angiography If the sound in the head when sleeping is the sound of other people talking and there is no one around, it is hallucination, which is a psychiatric symptom, to clarify whether the patient is organic or functional mental disorder, it is necessary to improve the cranial MRI and EEG. The patient should have a cranial MRI and an EEG, and if necessary, a lumbar puncture to check the cerebrospinal fluid for abnormalities. Organic mental disorders are most commonly caused by various types of cerebrovascular disease, encephalitis, brain tumors, etc. Functional mental disorders are most commonly caused by schizophrenia, etc.