Hallucination is a false sensory perception that occurs in the absence of an external stimulus. It is experienced as real and vivid by the individual, despite there being no actual object, sound, smell, taste, or sensation present. Hallucinations are important symptoms in psychiatry and are commonly associated with severe mental disorders, neurological illnesses, substance abuse, and certain medical conditions. Unlike illusions, where a real external stimulus is misinterpreted, hallucinations occur entirely without any external sensory input. Hallucinations may affect any of the five senses. Auditory hallucinations are the most common type and involve hearing voices, sounds, music, or noises that others cannot hear. The voices may comment on the person's actions, converse with each other, or issue commands. These are particularly common in schizophrenia and other psychotic disorders. Command hallucinations may instruct the person to perform certain actions, including harmful or dangerous acts, making prompt assessment and intervention essential. Visual hallucinations involve seeing objects, people, lights, shapes, or animals that are not actually present. They are more commonly associated with neurological disorders such as dementia, Parkinson's disease, delirium, epilepsy, and substance-induced conditions than with schizophrenia. The content of visual hallucinations can