Hallucinations involve sensing things while awake that appear to be real, but instead have been created by the mind.
Common hallucinations include:
In some cases, hallucinations may be normal. For example, hearing the voice of, or briefly seeing, a loved one who has recently died can be a part of the grieving process.
There are many causes of hallucinations, including:
A person who begins to hallucinate and is detached from reality should get checked by a health care professional right away. Many medical and psychiatric conditions that can cause hallucinations may quickly become emergencies.
A person who begins to hallucinate may become nervous, paranoid, and frightened, and should not be left alone.
Call your health care provider, go to the emergency room, or call the local emergency number (such as 911) if someone appears to be hallucinating and is unable to tell hallucinations from reality.
Your health care provider will do a physical examination and take a medical history. Blood may be drawn for testing.
Medical history questions may include the following:
Freudenriech O, Weiss AP, Goff DC. Psychosis and schizophrenia. In: Stern TA, Rosenbaum JF, Fava M, Biederman J, Rauch SL, eds. Massachusetts General Hospital Comprehensive Clinical Psychiatry. 1st ed. Philadelphia, Pa: Mosby Elsevier; 2008:chap 28.