Written by Elea Carey

Medically Reviewed by George Krucik, MD


What Is Psychosis?

Psychosis is a serious mental disorder characterized by thinking and emotions that are so impaired, that they indicate that the person experiencing them has lost contact with reality.


People who are psychotic have false thoughts (delusions) and/or see or hear things that are not there (hallucinations). These are referred to as “positive” symptoms; “negative” symptoms like loss of motivation and social withdrawal can also occur.


These experiences can be frightening and may cause people who are suffering from psychosis to hurt themselves or others. It is important to see a doctor right away if you or someone you know is experiencing symptoms of psychosis.


Psychosis affects three out of every 100 people. It is most likely to be diagnosed in young adults, but psychosis can happen to anyone.


Recognizing the Signs of Psychosis

Early stage psychosis:

  • difficulty concentrating

  • depressed mood

  • sleep changes—sleeping too much or not enough

  • anxiety

  • suspiciousness

  • withdrawal from family and friends

  • ongoing unusual thoughts and beliefs

  • Later stage psychosis

  • delusions

  • hallucinations

  • disorganized speech—switching topics erratically

  • depression

  • anxiety

  • suicidal thoughts or actions

  • difficulty functioning


Causes of Psychosis

Each case of psychosis is different, and the exact cause is not always entirely clear. There are, however, certain illnesses that cause psychosis. There are also triggers like drug use, lack of sleep, and other environmental factors. In addition, certain situations can lead to specific types of psychosis to develop (see “Types of Psychosis” below).



  • Illnesses that can cause psychosis:

  • brain diseases such as Parkinson’s disease, Huntington’s disease, and some chromosomal disorders

  • brain tumors or cysts

  • dementia (including Alzheimer’s disease)

  • HIV, syphilis, and other infections that attack the brain

  • some types of epilepsy

  • stroke


Environmental Causes

Psychosis can be triggered by the use of alcohol and illegal drugs, including stimulants such as methamphetamine (meth) and cocaine. Hallucinogenic drugs like LSD (acid) often cause users to see things that are not really there, but this effect is temporary. People who do not get enough sleep for long periods of time can experience symptoms of psychosis. Some prescription drugs like steroids and stimulants can cause symptoms of psychosis.


Risk Factors for Developing Psychosis

It is not currently possible to precisely identify individuals who are likely to develop a psychotic disorder. However, research has shown that genetics may play a role.


If one identical twin develops psychosis, there is a 50 percent chance the other twin will as well. Individuals with a close family member (parent or sibling) who has a psychotic disorder are more likely to develop a psychotic disorder.


Children born with the genetic mutation known as 22q11 deletion syndrome are at risk for developing a psychotic disorder, especially schizophrenia.


Types of Psychosis

Some kinds of psychosis are brought on by specific conditions or circumstances.


Brief Reactive Psychosis

Extreme personal stress like the death of a family member can bring on symptoms of psychosis. Someone experiencing brief reactive psychosis will recover in a few days.


Drug- or Alcohol-Related Psychosis

Use of alcohol and drugs can sometimes cause symptoms of psychosis. These symptoms might go away immediately when the effect of the alcohol or drug wears off, but this is not always the case. People who are addicted to alcohol and certain drugs can experience psychotic symptoms if they suddenly stop drinking or taking the drug to which they are addicted.


Organic Psychosis

A head injury or an illness that affects the brain like Parkinson’s disease can cause symptoms of psychosis.


Psychotic Disorders

The following types of psychoses are called psychotic disorders. They can be triggered by stress, drug or alcohol use, injury or illness, or they can appear on their own.


Bipolar Disorder

When someone has bipolar disorder, his or her moods swing from very high to very low. When his or her mood is high and positive, he or she may have symptoms of psychosis. The individual may feel extremely good and believe he or she has special powers. When his or her mood is depressed, the individual may have psychotic symptoms that make him or her feel angry, sad, or frightened. These symptoms include thinking someone is trying to harm him or her.


Delusional Disorder

A person suffering from delusional disorder strongly believes in things that are not real.


Psychotic Depression

This is major depression with psychotic symptoms.



Schizophrenia is psychosis that lasts longer than six months. Schizophrenia is a lifelong disease.


How Is Psychosis Diagnosed?

Psychosis is diagnosed through a psychiatric evaluation. That means a doctor will watch the person’s behavior and ask questions about what he or she is experiencing. Medical tests and X-rays may be used to determine whether there is an underlying illness causing the symptoms.


Diagnosing Psychosis in Children and Teenagers

Many of the symptoms of psychosis are perfectly normal in young people. For example, a teenager may suddenly need more sleep in response to changes in their body. Small children often have imaginary friends with whom they talk. If you are worried about psychosis in a child or adolescent, describe the individual’s behavior to a doctor.


Treatment of Psychosis

Treating psychosis may involve a combination of medications and therapy. Most people recover from psychosis with treatment.

Rapid Tranquilization

Sometimes people suffering from psychosis can become agitated and be at risk of hurting themselves or others. In those cases, it may be necessary to calm them down quickly. This method is called rapid tranquilization. A doctor or emergency response personnel will administer a fast-acting shot or liquid medicine to relax the patient right away.


Drugs and medication

Symptoms of psychosis can be controlled with medications called antipsychotics. These medicines reduce hallucinations and delusions and help people think more clearly. The type of medicine you are prescribed will depend on which symptoms you are experiencing. In many cases, people only need to take antipsychotics for a short time to get their symptoms under control. People with schizophrenia may have to stay on medications for life.


Cognitive Behavioral Therapy

Cognitive behavioral therapy means meeting regularly to talk with a mental health counselor with the goal of changing thinking and behaviors. This approach has been shown to be effective in helping patients make permanent changes and more effectively manage their illness.


Complications of Psychosis

Psychosis does not have many medical complications. However, if left untreated, it can make it hard for the people with this disorder to take good care of themselves. That could cause other illnesses to go untreated.


Is It Possible to Recover from Psychosis?

Most people who experience psychosis will recover with proper treatment. Even in severe cases, medication and therapy can help people live normal lives.

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The contents herein are for informational purposes only, therefore, should not be used as an alternative to seeking independent medical advice, and we cannot take responsibility for an individual’s decision to use them as such. Always seek the advice of your physician or other qualified health care provider with any questions you may have regarding a medical condition.