Types of Hallucinations

Table of ContentsView AllTable of Contents5 Types of HallucinationsTreatment for HallucinationsCoping with HallucinationsFrequently Asked Questions

Table of ContentsView All

View All

Table of Contents

5 Types of Hallucinations

Treatment for Hallucinations

Coping with Hallucinations

Frequently Asked Questions

A hallucination is something that a person may think that they are experiencing that isn’t really there. Hallucinations can happen through any of the five senses, creating aperception that they are real. Here we explore the different types of hallucinations based on each of the senses, also discussing their causes and treatment options.

At a Glance

We use our senses to decipher the world around us. What we see, hear, touch, taste, and feel impacthow we perceive our environmentand everything in it. Yet, sometimes these perceptions are false, appearing in the form of a hallucination. Here are five types of hallucinations based on their related senses.

Auditory Hallucinations

Auditory hallucinations involve hearing things that don’t exist or hearing-related distortions. Examples include hearing voices when no one is speaking, hearing music when none is playing, or hearing a phone ring when no one is calling.

An estimated 10% to 15% of healthy individuals experience these types of hallucinations.Auditory hallucinationsare also common in people with schizophrenia.

Research suggests that auditory hallucinations may occur with schizophrenia due to abnormalities in the structure of the auditory cortex, which is the part of the brain that processes auditory input.

Other causes of auditory hallucinations include:

Visual Hallucinations

Visual hallucinations involve distortions of what one sees or visions of things that aren’t there. Seeing a person who isn’t actually present in the room is an example of a visual hallucination. Animals, lights, and other objects can also be subjects of this hallucination type.

Visual hallucinations may look like:

Visual distortions are often present withneurological disorders, such as Parkinson’s disease and dementia with Lewy bodies, or mental disorders like schizophrenia.Some research has connected these hallucinations with atypical activity within nerve fibers that connect the thalamus and cortical regions of the brain.

This type of hallucination can also occur as a side effect of certain medications. This includes those designed to treat sleep disorders as well as medicines used to treat various types of infections (bacterial, fungal, and viral).

It’s also common to experience visual hallucinations in the stage between wakefulness and sleep.These are called hypnagogic hallucinations and during them, people generally realize that what they are seeing is not real.

Tactile Hallucinations

Tactile hallucinations involve physical sensations on or within the body. With this type of hallucination, someone may falsely perceive that something is crawling on or stinging them, for example, or that their internal organs are shifting inside their body.

Roughly one in four people with schizophrenia experience tactile hallucinations.People withAlzheimer’s disease, Parkinson’s, and Lewy body dementia sometimes experience these hallucinations as well.

Tactile hallucinations can occur with recreational drugs like amphetamines, cocaine, and other narcotics. They’re also a potential side effect of some prescription drugs, including those designed to treat Parkinson’s, depression, high blood pressure, and epilepsy, along withprescription stimulants.

Olfactory Hallucinations

Also referred to as phantosmia, olfactory hallucinations involve smelling something that is not there. Someone with this hallucination type may perceive the smell of rotting garbage, burning rubber, smoke, chemicals, or some other item or substance that doesn’t exist.

One study involving 2,500 individuals found that 4.2% of the subjects experienced olfactory hallucinations, with more than half (56%) experiencing them in combination with other types of hallucinations.It further noted that smell-related hallucinations were more common in subjects with anxiety or who had gone throughstressful life events.

People with epilepsy or some level of brain damage may also have olfactory hallucinations. These hallucinations may even signal that a migraine is coming on.

Olfactory hallucinations can be especially troubling if they overlap with delusions. For a person who believes the house is on fire, for example, an olfactory hallucination of smoke would validate that belief.

Gustatory Hallucinations

Gustatory hallucinations involve false taste perceptions. Taste-related hallucinations include those described as bitter, metallic, rusty, or salty.

This type of hallucination is fairly prevalent in people with epilepsy.People with schizophrenia may also experience gustatory hallucinations, though less frequently than other hallucination types.

Like olfactory hallucinations, gustatory hallucinations can pose particular distress whencoupled with delusions. For example, a taste hallucination may be extremely upsetting for someone with a delusion that they are being poisoned. They might perceive it as proof that the delusion is true.

Treating hallucinations requires identifying the condition causing them. Depending on the cause, a clinician may recommend therapy, medication, or another treatment option.

Therapy

Therapy can provide positive effects for people who experience hallucinations.Thetherapeutic approachesused for this purpose can vary.

Some therapies may involve increasing the patient’s acceptance of their hallucinations. Others may utilize a mindfulness approach or seek to find the connection between the hallucinations experienced and the patient’s personal history, relationships, or views of oneself.

Medications

Medications can help reduce the frequency of hallucinations. For example,selective serotonin reuptake inhibitors(SSRIs) can be helpful for visual hallucinations.Others may prescribed to help calm a person so they can cope with these false sight, taste, smell, touch, or hearing-related perceptions.

Research on drugs and treatments for hallucinations is ongoing with newer options being assessed. Progress is being made on this front, such as the drug Nuplazid (pimavanserin) being the first approved medication for hallucinations associated with Parkinson’s disease.

Other Treatments

Treatments that extend beyond therapy and medication may be options for certain hallucination types. Based on research,transcranial magnetic stimulation (TMS)might help reduce the frequency and severity of auditory hallucinations in some people with schizophrenia.

Depending on the cause, other treatment options may be available. These can include the use of various aids (such as using eyeglasses to improve vision and reduce visual hallucination frequency), surgery, and patient education.

Certain strategies may also be employed to help patients cope with their hallucinations. As an example, a person experiencing auditory hallucinations in the form of voices might benefit from:

A physician or mental health professional can help patients get to the bottom of these distressing occurrences and find a treatment that works for them.

Frequently Asked QuestionsSimple visual hallucinations may be experienced in the form of lines, shapes, or flashes of light while more complex hallucinations can involve vivid, realistic images of people, faces, or animals.Amphetamines, cocaine, and other narcotics can cause hallucinations. So can certain prescription drugs, including anti-Parkisonian medications, antidepressants, stimulants, antihypertensives, and antiepileptics.Learn More:Negative Side Effects of AntidepressantsA hallucination is a sensory experience, such as seeing an animal that isn’t there. A delusion involves an erroneous belief—for example, a person might believe they’re being poisoned.Learn More:Delusions vs. Hallucinations

Simple visual hallucinations may be experienced in the form of lines, shapes, or flashes of light while more complex hallucinations can involve vivid, realistic images of people, faces, or animals.

Amphetamines, cocaine, and other narcotics can cause hallucinations. So can certain prescription drugs, including anti-Parkisonian medications, antidepressants, stimulants, antihypertensives, and antiepileptics.Learn More:Negative Side Effects of Antidepressants

Amphetamines, cocaine, and other narcotics can cause hallucinations. So can certain prescription drugs, including anti-Parkisonian medications, antidepressants, stimulants, antihypertensives, and antiepileptics.

Learn More:Negative Side Effects of Antidepressants

A hallucination is a sensory experience, such as seeing an animal that isn’t there. A delusion involves an erroneous belief—for example, a person might believe they’re being poisoned.Learn More:Delusions vs. Hallucinations

A hallucination is a sensory experience, such as seeing an animal that isn’t there. A delusion involves an erroneous belief—for example, a person might believe they’re being poisoned.

Learn More:Delusions vs. Hallucinations

19 Sources

Verywell Mind uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read oureditorial processto learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.

Dirk Blom J.Chapter 24 - Auditory hallucinations.Handbook Clin Neurol. 2015;129:433-455. doi:10.1016/B978-0-444-62630-1.00024-X

Mørch-Johnsen L, Nesvåg R, Jørgensen KN, et al.Auditory cortex characteristics in schizophrenia: Associations with auditory hallucinations.Schizophren Bull. 2017;43(1):75-83. doi:10.1093/schbul/sbw130

Waters F, Blom JD, Jardri R, Hugdahl K, Sommer IEC.Auditory hallucinations, not necessarily a hallmark of psychotic disorder.Psycholog Med. 2017;48(4):529-536. doi:10.1017/S0033291717002203

Leptourgos P, Bouttier V, Denève S, Jardri R.From hallucinations to synaesthesia: A circular inference account of unimodal and multimodal erroneous percepts in clinical and drug-induced psychosis.Neurosci Biobehav Rev. 2022;135:104593. doi:10.1016/j.neubiorev.2022.104593

Carter R, ffytche DH.On visual hallucinations and cortical networks: a trans-diagnostic review.J Neurol. 2015;262:1780-1790. doi:10.1007/s00415-015-7687-6

Taam MA, de Boissieu P, Taam RA, Breton A, Trenque T.Drug-induced hallucination: A case/non case study in the French Pharmacovigilance Database.Eur J Psychiatry. 2015;29(1):21-31. doi:10.4321/S0213-61632015000100002

Cleveland Clinic.Hypnagogic hallucinations.

Nakamura M, Koo J.Drug-induced tactile hallucinations beyond recreational drugs.Am J Clin Dermatol. 2016;17:643-652. doi:10.1007/s40257-016-0219-z

Wehling E, Bless JJ, Hirnstein M, et al.Olfactory hallucinations in a population-based sample.Psychiatry Res. 2021;304:114117. doi:10.1016/j.psychres.2021.114117

Agessi LM, Villa TR.Vestibular migraine with visual aura and olfactory hallucination in children: Two case reports.Neuropediat. 2018;49(06):414-416. doi:10.1055/s-0038-1673642

Cleveland Clinic.Hallucinations.

Baethge C, Jänner M, Gaebel W, Malevani J.Psychopathological and demographic characteristics of hallucinating patients with schizophrenia and schizoaffective disorder: an analysis based on AMDP data.Eur Arch Psychiatry Clin Neurosci. 2017;267:295-301. doi:10.1007/s00406-016-0738-x

Thomas N, Hayward M, Peters E, et al.Psychological therapies for auditory hallucinations (voices): Current status and key directions for future research.Schiz Bull. 2014;40(4):S202-S212. doi:10.1093/schbul/sbu037

U.S. Food and Drug Administration.FDA approves first drug to treat hallucinations and delusions associated with Parkinson’s disease.

Oyamada Otani VH, Shiozawa P, Cordeiro Q, Ryoiti Uchida R.A systematic review and meta-analysis of the use of repetitive transcranial magnetic stimulation for auditory hallucinations treatment in refractory schizophrenic patients.Int J Psychiatry Clin Pract. 2015;19(4):228-232. doi:10.3109/13651501.2014.980830

Cleveland Clinic.Auditory hallucinations.

Mukamal R.Visual hallucinations surprisingly common in age-related macular degeneration. American Academy of Opthalmology.

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