Hallucinations may be reflected in various clinical situations. 1. Drugs: If you take drugs that may cause hallucinations, sometimes they lead to a transient state of delirium. 2. Organic brain diseases: Brain infarction, encephalitis, brain hemorrhage, brain tumors, etc. After reasonable treatment of brain diseases, hallucinations will slowly be controlled. 3, mental illness: hallucinations are a common symptom of schizophrenia, which can be controlled through effective medication. For schizophrenia, you must adhere to the medication and follow up regularly in order to control the symptoms well.