Hallucinations are sensations that appear to be real but are created within the mind. Examples include seeing things that are not there, hearing voices or other sounds, experiencing body sensations like crawling feelings on the skin, or smelling odors that are not there. Hallucinations can be a feature of psychotic disorders such as schizophrenia and are also very common in drug-induced states and in drug withdrawal. This occurs with a number of different drugs. People who are seriously ill, such as those with liver failure or kidney failure, can experience hallucinations. High fevers can also produce hallucinations in some people. Hallucinations can accompany other psychotic symptoms such as delusions and disconnection from reality. They can be temporary or persist over the long term, depending upon the exact type of hallucinations and their cause.
Other causes of hallucinations
- Brain Trauma
- Charles Bonnet Syndrome
- Delirium
- Delusional Disorder
- Drug-Induced Psychosis
- Liver Failure
- LSD Use
- Peduncular Hallucinosis
- Sleep Disturbances
- Temporal Lobe Epilepsy
- Toxins
SLIDESHOW
Schizophrenia: Symptoms, Types, Causes, Treatment See SlideshowCauses of Hallucinations
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Acanthamoeba
Acanthamoeba is an amoeba that lives in dust, soil, and fresh, sea, and brackish water. Acanthamoeba keratitis causes eye pain, a sensation of something in the eye, and blurry vision. Acanthamoeba causes granulomatous encephalitis, leading to seizures, hallucinations, stiff neck, nausea, and vomiting. Diseeminated infection may also result from Acanthamoeba infection.
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Alcoholism
Alcoholism is a disease that includes alcohol craving and continued drinking despite repeated alcohol-related problems, such as losing a job or getting into trouble with the law. It can cause myriad health problems, including cirrhosis of the liver, birth defects, heart disease, stroke, psychological problems, and dementia. Counseling and a few medications can be effective for alcoholism treatment.
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Alzheimer's Disease
Alzheimer's disease is a common cause of dementia. Symptoms and warning signs of Alzheimer's disease include memory loss, difficulty performing familiar tasks, disorientation to time and place, misplacing things, and more. The biggest risk factor for Alzheimer's disease is increased age. Treatment for Alzheimer's is often targeted toward decreasing the symptoms and progression of the disease.
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Autism: Early Signs and Symptoms
Autism is known as a condition that falls under the category of the "autism spectrum disorders" because there is wide variation in the type and severity of symptoms people experience. Autism spectrum disorder (ASD) is a developmental disorder that affects communication and behavior of an individual. Autism is said to be a "developmental disorder" because the signs and symptoms of the disorder generally appear in the first two years of life. However; toddlers, teens, and adults also can have autism. Early signs and symptoms can vary amongst infants, babies, toddlers, teens, and adults that may include; no eye contact, not responding to his or her name; doesn’t babble or “baby talk”; does not use language correctly; rocking; twirling; and head banging.
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Bipolar Disorder
Bipolar disorder (or manic depression) is a mental illness characterized by depression, mania, and severe mood swings. Treatment may incorporate mood-stabilizer medications, antidepressants, and psychotherapy.
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Brain and Spinal Cord Tumors in Adults (Symptoms, Signs, Causes, Treatment Options, Life Expectancy)
Brain and spinal tumor are diseases in which cancer (malignant) cells begin to grow in the tissues of the brain. Tumors that start in the brain are called primary brain tumors. Tumors that start in the brain and spread to other organs are called primary brain tumors. Symptoms may include headaches, personality changes, dizziness, and trouble walking. Treatment depends upon the type and grade of tumor.
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Brain Eating Amoeba (Naegleria fowleri)
Naegleria fowleri is an amoeba found in freshwater and soil. Infection results when the amoeba enters the nose and travels to the brain and spinal cord, causing primary amebic meningoencephalitis, which destroys brain tissue.
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Brain Tumor: Warning Symptoms, Types, Causes, Treatments, and Cure
A brain tumor can be either non-cancerous (benign) or cancerous (malignant), primary, or secondary. Common symptoms of a primary brain tumor are headaches, seizures, memory problems, personality changes, and nausea and vomiting. Causes and risk factors include age, gender, family history, and exposure to chemicals. Treatment is depends upon the tumor type, grade, and location.
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Cocaine and Crack Abuse
Cocaine is an addictive stimulant that is smoked, snorted, and injected. Crack is cocaine that comes in a rock crystal that is heated to form vapors, which are then smoked. Cocaine has various effects on the body, including dilating pupils, constricting blood vessels, increasing body temperature, heart rate, and blood pressure.
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Creutzfeldt-Jakob Disease
Creutzfeldt-Jakob disease (CJD) is a rare, degenerative, invariably fatal brain disorder. CJD generally appears in the later years and runs a rapid course. Symptoms of CJD include failing memory, lack of coordination, visual disturbances, failing memory, blindness, weakness, and eventually coma. There are three major categories of CJD; 1) sporadic CJD, 2) hereditary CJD, and 3) acquired CJD. There is no cure for Creutzfeldt-Jakob disease.
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Dementia
Dementia is defined as a significant loss of intellectual abilities such as memory capacity, severe enough to interfere with social or occupational functioning. There are several different types of dementia, including cortical, subcortical, progressive, primary, and secondary dementias. Other conditions and medication reactions can also cause dementia. Dementia is diagnosed based on a certain set of criteria. Treatment for dementia is generally focused on the symptoms of the disease.
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Depression
Depression is an illness that involves the body, mood, and thoughts and affects the way a person eats and sleeps, the way one feels about oneself, and the way one thinks about things. The principal types of depression are major depression, dysthymia, and bipolar disease (also called manic-depressive disease).
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Drug Abuse
Drug addiction is a chronic disease that causes drug-seeking behavior and drug use despite negative consequences to the user and those around him. Though the initial decision to use drugs is voluntary, changes in the brain caused by repeated drug abuse can affect a person's self-control and ability to make the right decisions and increase the urge to take drugs. Drug abuse and addiction are preventable.
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Fever in Adults and Children
Although a fever technically is any body temperature above the normal of 98.6 F (37 C), in practice, a person is usually not considered to have a significant fever until the temperature is above 100.4 F (38 C). Fever is part of the body's own disease-fighting arsenal; rising body temperatures apparently are capable of killing off many disease-producing organisms.
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Human Immunodeficiency Virus (HIV)
HIV (human immunodeficiency virus) infection left untreated causes AIDS (acquired immunodeficiency syndrome). Still incurable, AIDS describes immune system collapse that opens the way for opportunistic infections and cancers to kill the patient. Early symptoms and signs of HIV infection include flu-like symptoms and fungal infections, but some people may not show any symptoms for years. Highly active antiretroviral therapy (ART) is the standard treatment for HIV infection. These combination drug regimens have made HIV much less deadly, but a cure or vaccine for the pandemic remains out of reach. HIV is usually transmitted through sexual contact or sharing IV drug needles, but can also infect someone through contact with infected blood. Sexual abstinence, safe sex practices, quitting IV drugs (or at least using clean needles), and proper safety equipment by clinicians and first responders can drastically reduce transmission rates for HIV/AIDS.
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Huntington's Disease
Huntington's disease is the result of degeneration of neurons in areas of the brain. Huntington's disease is an inherited disorder. Early symptoms include mood swings, apathy, depression, and anger uncharacteristic of the individual. Judgement, memory, and other cognitive functions may become impaired. Presymptomatic testing is available for individuals who have a family history of Huntington's disease. Treatment includes medication and therapy for symptoms.
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Kidney (Renal) Failure
Kidney failure can occur from an acute event or a chronic condition or disease. Prerenal kidney failure is caused by blood loss, dehydration, or medication. Some of the renal causes of kidney failure include sepsis, medications, rhabdomyolysis, multiple myeloma, and acute glomerulonephritis. Post renal causes of kidney failure include bladder obstruction, prostate problems, tumors, or kidney stones.Treatment options included diet, medications, or dialysis.
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Lewy Body Dementia (Dementia with Lewy Bodies)
Lewy body dementia (LBD or dementia with Lewy bodies) is one the most common causes of dementia. There are two types of LBD: 1) dementia with Lewy bodies, and 2) Parkinson's disease dementia. Symptoms of LBD are changes in a person's ability to think, movement problems, and sleep disorders. Treatment of LBD includes lifestyle changes, management of symptoms, palliative care, and medications to manage symptoms.
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Marijuana (Cannabis)
Get the latest marijuana statistics and information. Learn its effects and how this drug, also known as pot, affects the brain. Also learn about medical marijuana for cancer patients and its indications.
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Narcolepsy (Definition, Symptoms, Treatment, Medication)
Causes of narcolepsy, a chronic disease of the central nervous system, have not been fully determined. Some theories include abnormalities in hypocretin neurons in the brain or an autoimmune disorder. Symptoms of narcolepsy include: excessive daytime sleepiness, cataplexy, hypnagogic hallucinations, sleep paralysis, disturbed nocturnal sleep, and automatic behavior. Diagnosis of narcolepsy is based on a clinical evaluation, specific questionnaires, sleep logs or diaries, and the results of sleep laboratory tests. Treatments of narcolepsy symptoms include medication and lifestyle changes.
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Parkinson's Disease
Parkinson's disease is a slowly progressive neurological disease characterized by a fixed inexpressive face, a tremor at rest, slowing of voluntary movements, a gait with short accelerating steps, peculiar posture and muscle weakness, caused by degeneration of an area of the brain called the basal ganglia, and by low production of the neurotransmitter dopamine. Most patients are over 50, but at least 10 percent are under 40.
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Postpartum Depression
Postpartum depression is a form of depression that occurs within a year after delivery. It is thought that rapid hormone changes after childbirth may lead to depression. Symptoms of postpartum depression include crying a lot, headaches, chest pains, eating too little or too much, sleeping too little or too much, withdrawal from friends and family, and feeling irritable, sad, hopeless, worthless, guilty, and overwhelmed. Treatment typically involves talk therapy and medication.
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Psychotic Disorders
Psychotic disorders are a group of serious illnesses that affect the mind. Different types of psychotic disorders include schizophrenia, schizoaffective disorder, schizophreniform disorder, brief psychotic disorder, shared psychotic disorder, delusional disorder, substance-induced psychotic disorder, paraphrenia, and psychotic disorders due to medical conditions.
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Schizoaffective Disorder
Schizoaffective disorder is a mental illness that features schizophrenia and a mood disorder, either major depression or bipolar disorder. Symptoms include agitation, suicidal thoughts, little need for sleep, delusions, hallucinations, and poor motivation. Treatment may involve psychotherapy, medication, skills training, or hospitalization.
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Schizophrenia
Schizophrenia is a disabling brain disorder that may cause hallucinations and delusions and affect a person's ability to communicate and pay attention. Symptoms of psychosis appear in men in their late teens and early 20s and in women in their mid-20s to early 30s. With treatment involving the use of antipsychotic medications and psychosocial treatment, schizophrenia patients can lead rewarding and meaningful lives.
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Schizotypal Personality Disorder
Schizotypal personality disorder is characterized by odd behaviors, feelings, perceptions, and ways of relating to others that interfere with one's ability to function. Medication and psychotherapy can help the sufferer to manage their symptoms.
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Steroid Abuse
Anabolic steroids are synthetic substances that are related to testosterone and promote skeletal muscle growth and the development of male sexual characteristics in both men and women. In the 1930s, it was discovered that anabolic steroids could promote skeletal muscle growth in lab animals, which lead to anabolic steroid abuse by bodybuilders and weight lifters.
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Stroke
A stroke is an interruption of the blood supply to part of the brain caused by either a blood clot (ischemic) or bleeding (hemorrhagic). Symptoms of a stroke may include: weakness, numbness, double vision or vision loss, confusion, vertigo, difficulty speaking or understanding speech. A physical exam, imaging tests, neurological exam, and blood tests may be used to diagnose a stroke. Treatment may include administration of clot-busting drugs, supportive care, and in some instances, neurosurgery. The risk of stroke can be reduced by controlling high blood pressure, high cholesterol, diabetes, and stopping smoking.
Examples of Medications for Hallucinations
- aripiprazole (Abilify, Aristrada)
- chlorpromazine - oral, Thorazine
- chlorpromazine-injection, Thorazine
- clozapine (Clozaril, Fazacio ODT, Versacloz)
- fluphenazine (Permitil, Prolixin)
- fluphenazine concentrate - oral, Prolixin
- fluphenazine liquid - oral, Prolixin
- haloperidol (Haldol)
- olanzapine (Zyprexa, Zydis)
- quetiapine (Seroquel)
- risperidone, Risperdal; Risperdal Consta, Risperdal M-TAB
- thiothixene - oral, Navane
- ziprasidone (Geodon)
