Hallucinating
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False sensory perception
I keep seeing small insects (which are not real)
See things don't exist
Have hallucinations
Seeing things and feeling restless after cutting down on alcohol less than 2 days ago
Hallucinating things and insects after stopping alcohol for 2 days or less
Imaginary insects
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Content updated on Sep 6, 2022
About the symptom
Most commonly, a hallucination can be seeing or hearing something that does not exist, but it could also include one of the other senses such as smell or of touch. It can be caused by many different physical or psychiatric conditions.
When to see a doctor
Seek professional care if you experience any of the following symptoms
Hallucinations
Possible causes
- Schizophrenia
A psychological disorder where there is altered brain function. The exact cause is unknown, but a combination of genetic, psychological and environmental factors are likely responsible.
- Dissociative disorder
Dissociative disorder is mental disorder that involve experiencing a disconnection and lack of continuity between thoughts, memories, surroundings, actions and identity. People with dissociative disorder escape reality in ways that are involuntary and unhealthy and cause problems with functioning in everyday life.
- Alzheimer dementia (AD)
Alzheimer's disease is the most common cause of dementia. The brain shrinks affecting memory and behavior. Symptoms worsen over time, and can interfere with daily life. Increasing age increases the risk for Alzheimer dementia.
- Hypothyroidism
- Alcohol dependence / delirium tremens
- Pellagra
Related serious diseases
- Dehydration
Dehydration occurs when you lose more fluid than you take in, and your body does not have as much water as it needs. Common causes of dehydration include inadequate intake, diarrhea, vomiting and fever. Dehydration can also lead to serious complications including seizures, urinary and kidney problems.
- Epilepsy
Posterior reversible encephalopathy syndrome (PRES)
- Wernicke encephalopathy
Questions your doctor may ask about this symptom
Your doctor may ask these questions to check for this symptom
Have you ever seen, heard, or smelt something that did not actually exist?
Have you currently regained consciousness after temporarily losing consciousness?
Do you have headaches or does your head feel heavy?
Do you have a fever?
Do you feel any weakness in your arms or legs?
Other Related Symptoms
Similar symptoms or complaints
Symptoms from the same body system / part
Symptoms treated by the same specialty
References
Jardri R, Larøi F, Waters F; International Consortium on Hallucination Research. Hallucination Research: Into the Future, and Beyond. Schizophr Bull. 2019 Feb 1;45(45 Suppl 1):S1-S4. doi: 10.1093/schbul/sby170. PMID: 30715538; PMCID: PMC6357977.
https://academic.oup.com/schizophreniabulletin/article/45/Supplement_1/S1/5305654
Zepf J, Zepf S. Hallucination in Adolescence-Or, Nora in Nowhereland Between Neurosis and Psychosis. Psychoanal Rev. 2018 Oct;105(5):463-480. doi: 10.1521/prev.2018.105.5.463. PMID: 30300083.
https://guilfordjournals.com/doi/10.1521/prev.2018.105.5.463
Graux J, Lemoine M, El Hage W, Camus V. From depersonalization to hallucination. Psychopathology. 2012;45(1):42-52. doi: 10.1159/000325911. Epub 2011 Nov 28. PMID: 22123515.
https://www.karger.com/Article/Abstract/325911
Blom JD. Auditory hallucinations. Handb Clin Neurol. 2015;129:433-55. doi: 10.1016/B978-0-444-62630-1.00024-X. PMID: 25726283.
https://www.sciencedirect.com/science/article/abs/pii/B978044462630100024X?via%3Dihub
Wu F, Cheng J, Wang X, Wang L, Tao D. Image Hallucination From Attribute Pairs. IEEE Trans Cybern. 2022 Jan;52(1):568-581. doi: 10.1109/TCYB.2020.2979258. Epub 2022 Jan 11. PMID: 32275630.
https://ieeexplore.ieee.org/document/9059026
Just 3 minutes.
Developed by doctors.
Ubie is supervised by 50+ medical experts worldwide
Seiji Kanazawa, MD, PHD
Obstetrics and gynecology (OBGYN)
National Center for Child Health and Development, Japan