Schizophrenia: What Are the Early Signs and How Is It Treated?

Early schizophrenia often begins in the late teens to early thirties with gradual changes: withdrawing from friends, a drop in school or work performance, trouble thinking clearly, odd or suspicious beliefs, and sometimes hearing or seeing things others do not. Many other conditions can look similar, so a clinician needs to evaluate. Treatment usually combines antipsychotic medicine, psychotherapy and family support, and outcomes tend to be better when care starts early. This article covers early signs, evaluation, treatment and when to get urgent help.

What schizophrenia is

Schizophrenia is a serious mental health condition that affects how a person thinks, feels and perceives the world. The National Institute of Mental Health (NIMH) describes it as a psychotic disorder, meaning a person may lose some contact with shared reality. It is not a "split personality," and it is not caused by bad parenting or personal weakness.

Most people with schizophrenia are not violent, and they are more often victims of violence than perpetrators. Risk of harm to others is higher in a small subset, particularly with untreated psychosis or substance use, which is why the emergency list below matters.

Early signs of schizophrenia: the prodrome

Before the first clear episode of psychosis, many people go through a period clinicians call the prodrome. It can last weeks to years, and it is often noticed only in hindsight. Several of these changes are also common in depression, substance use, trauma, autism, or ordinary teenage stress, so one sign alone does not point to schizophrenia.

• Social withdrawal. Pulling away from friends and family, or spending far more time alone.
• Declining function. Falling grades, trouble holding a job, or neglecting hygiene and daily routines.
• Changes in thinking. Trouble concentrating, remembering, or following a conversation.
• Unusual ideas or perceptions. Feeling watched, sensing that things are strange or have special meaning, or brief hearing of whispers.
• Mood and sleep changes. Irritability, flat or mismatched emotions, anxiety, or disrupted sleep.

For how depression can show up differently, see our page on early warning signs of depression. Here the focus stays on psychosis.

The three groups of symptoms

NIMH groups symptoms of established schizophrenia into psychotic, negative and cognitive symptoms. Knowing the groups helps explain why the condition can look so different from one person to the next.

Psychotic symptoms

• Hallucinations: sensing things that others do not, most often hearing voices.
• Delusions: firmly held beliefs that do not change with evidence, such as believing one is being followed or controlled.
• Disorganized thinking and speech: jumping between topics or giving answers that are hard to follow.
• Unusual movements or behavior, including agitation or, less often, staying very still.

Negative symptoms

These are reductions in usual function: less emotional expression, less speech, loss of motivation, and loss of interest in activities. They are easy to mistake for laziness or depression, and they can be among the more disabling features over time.

Cognitive symptoms

These include trouble with attention, working memory and planning. They can affect school and work even when hallucinations are well controlled.

How clinicians evaluate it

There is no blood test or scan that diagnoses schizophrenia. Clinicians combine a detailed history, a mental status examination, information from family when the person agrees, and tests to look for other explanations. Clinicians generally use the diagnostic criteria in the American Psychiatric Association's DSM-5-TR, which call for two or more characteristic symptoms (at least one being delusions, hallucinations or disorganized speech) present for a significant part of one month, a decline in functioning, and continuous signs of disturbance for at least six months. MedlinePlus gives a patient-level overview of the condition.

Evaluation often includes a physical examination and sometimes blood or urine tests, because several conditions can cause psychosis, including:

• Substance use, including stimulants, hallucinogens and, in some people, cannabis. Our article on regular cannabis use and psychosis covers that link in detail.
• Medicine side effects or withdrawal.
• Thyroid disease, infections, autoimmune conditions, seizures or brain injury.
• Mood disorders with psychotic features, such as severe depression or bipolar disorder. Schizoaffective disorder involves a major mood episode alongside psychosis.

Duration also helps separate related diagnoses: brief psychotic disorder lasts under one month, schizophreniform disorder one to six months, and schizophrenia six months or more. Getting the diagnosis right matters because the treatment differs. Clinicians may also reassess over time, since the picture can become clearer as symptoms evolve.

What causes it

The cause is not fully understood. Research points to several contributing factors acting together: genetics, differences in brain development and chemistry, and environmental stressors such as prenatal complications, trauma, or heavy substance use in adolescence. Having a relative with schizophrenia raises the chance, but most people with a family history never develop it, and many people with the condition have no known family history.

How schizophrenia is treated

Schizophrenia is generally managed as a long-term condition. Many people improve substantially with treatment, and some recover well, although outcomes vary. A plan usually has several parts that work together.

Antipsychotic medicine

Antipsychotics are the main medicine treatment. They can reduce hallucinations, delusions and disorganized thinking, and can lower the chance of relapse. They are generally less effective for negative and cognitive symptoms. Different medicines have different side effects, and some are available as long-acting injections for people who find daily pills hard to keep up.

The US prescribing information for antipsychotics carries a boxed warning about an increased risk of death in older adults with dementia-related psychosis, and these medicines are not approved for that use. Other side effects can include sleepiness, restlessness, movement problems and weight gain. Some can raise blood sugar and cholesterol, which is why regular checks are recommended; see our article on weight and blood sugar checks with antipsychotics. Clozapine is generally used when other antipsychotics have not worked. Its label carries boxed warnings, including severe neutropenia (a low white blood cell count), orthostatic hypotension with slow heart rate and fainting, seizures, myocarditis and cardiomyopathy, and increased mortality in older adults with dementia-related psychosis. Its labeling also warns about gastrointestinal hypomotility, a slowing of the bowel that can lead to severe constipation and, in some cases, blockage. The clozapine label calls for regular absolute neutrophil count (ANC) blood monitoring on a schedule the prescriber sets; do not skip a scheduled blood test, and call the prescriber if one is missed. If you have missed clozapine for 2 or more days, do not restart at your usual dose. Call the prescriber first, because the dose usually has to be restarted lower and built up gradually; restarting at the full dose can cause severe low blood pressure, fainting, collapse or seizure.

If you take clozapine, fever, sore throat, mouth sores or other signs of infection can signal a dangerously low white blood cell count and need same-day contact with the prescriber or an emergency department for a blood count. Constipation that lasts several days, or that is new or worsening, should be reported to the prescriber the same day so they can decide what to do. Severe belly pain, a swollen belly, or repeated vomiting while on clozapine can signal a bowel blockage and needs the emergency room now.

Clozapine can also affect the heart, most often in the first weeks of treatment. Chest pain, shortness of breath, or a racing or irregular heartbeat while taking clozapine can signal myocarditis or a heart rhythm problem and needs 911 or the emergency room on its own, even without fainting. Fever with fatigue, palpitations or a flu-like illness can be an early sign of myocarditis and needs same-day contact with the prescriber or an emergency department. A seizure on any antipsychotic is a separate emergency and needs 911; with clozapine, seizures can be a direct, dose-related effect of the medicine. Fainting that does not quickly resolve also needs 911, while a brief faint that has fully recovered still needs same-day contact with the prescriber.

Do not stop or change the dose or timing of an antipsychotic on your own. Stopping suddenly can raise the chance of relapse and may cause withdrawal-type effects, and this applies to long-acting injections too. If side effects are a problem, tell the prescriber before changing anything; they can decide whether a different dose, timing or medicine is appropriate.

Some other side effects need prompt attention. Trouble swallowing or breathing, or spasms of the throat or tongue, need 911. Muscle spasms of the neck or jaw need same-day care from the prescriber or an urgent care or emergency department; call 911 if the spasm affects breathing, swallowing or speech. Severe restlessness with distress needs same-day care. Thoughts of suicide: call or text 988 now; with a plan, intent or self-harm, call 911. A rare reaction called neuroleptic malignant syndrome, with fever, stiff muscles and new confusion, especially with a very fast heartbeat or heavy sweating, is an emergency; call 911 or go to the ER.

Psychotherapy and skills training

Cognitive behavioral therapy for psychosis can help people cope with distressing voices and beliefs. Family education and support, social skills training and supported employment or education also play a role in recovery.

Coordinated specialty care

For a first episode of psychosis, NIMH describes coordinated specialty care, a team approach that combines medicine, therapy, family involvement, and help with school or work. Programs are available in many US states, and starting early is associated with better outcomes. Ask a primary care clinician or call your state or county mental health agency to find one.

Living with it day to day

• Keep a regular sleep schedule, since poor sleep can make symptoms worse.
• Avoid alcohol and recreational drugs when possible; they can worsen symptoms and interfere with treatment.
• Smoking is common in people with schizophrenia; ask your clinician about help quitting.
• Keep up with physical health care, since people with schizophrenia have higher rates of heart disease and diabetes.

How to help someone you are worried about

Stay calm and speak simply. You do not need to argue about whether a voice or belief is real; you can acknowledge that it feels real to them while expressing concern. Encourage an appointment with a primary care clinician or mental health professional, and offer to go along. Warning signs of a crisis are covered in our page on mental health crises and where to get help.

In the US, the 988 Suicide and Crisis Lifeline is available by call or text at 988 at any hour. People with schizophrenia have a higher risk of suicidal thoughts and attempts than the general population, so any talk of self-harm deserves prompt attention.

When to Seek Medical Care