Diseases that can cause hallucinations include schizophrenia, acute transient mental disorder, epilepsy, mental disorders caused by brain organs such as intracranial infections, brain tumors and cerebrovascular disease, and heavy alcohol dependence. The details are as follows: 1. Schizophrenia: positive symptoms include hallucinations and delusions, etc. Hallucinations include auditory hallucinations, visual hallucinations, olfactory hallucinations, gustatory hallucinations and tactile hallucinations, with auditory hallucinations being the most common. Auditory hallucinations are the most common, such as hearing the chirping of insects and birds, the rumbling of cars, boats and machines, and the sound of music, etc.; they may also hallucinate that someone is calling their own name, or that they hear the obscene language or comments of some people. 2. Acute transient mental disorder: acute mental symptoms appear within 2 weeks, manifested as fragmentary delusions or hallucinations, in various forms, which may be manifested as speech and behavioral disorders. 3. Epilepsy:in focal sensory seizures, there may be sensory abnormalities, such as abnormalities in taste, smell, hearing, hallucinations, etc. 4. Organic mental disorders: These include mental disorders caused by cerebral degenerative diseases, traumatic brain injury, intracranial infections, dementia, brain tumors and cerebrovascular disease, etc. A common clinical syndrome manifests as delirium, in which perceptual disorders are particularly common, including sensory sensitivity, illusions and hallucinations, and hallucinations are predominantly visual hallucinations. Hallucinations are mainly visual hallucinations. Hallucinations may also occur if certain psychostimulant drugs or high fever are used, so it is recommended to consult a doctor in time to clarify the cause of the illness. It should be reminded that for patients who have been experiencing continuous hallucinations for more than 2 weeks, it is recommended that their family members accompany them to the hospital for a comprehensive and standardized examination, so as to avoid delaying their condition and causing adverse consequences.