There is no single test for schizophrenia. It is usually diagnosed after assessment by a mental health specialist.
If you're concerned you may be developing schizophrenia, talk to your GP as soon as possible.
Your GP will ask about your symptoms and check they're not the result of other causes. For example, recreational drug use.
Assessment and diagnosis
If your GP thinks you may have schizophrenia, they will refer you to a community mental health team (CMHT). They support people with complex mental health difficulties.
A psychiatrist or mental health team member will assess your symptoms. They'll ask about your history and current circumstances.
To make a diagnosis, most mental healthcare professionals use a diagnostic checklist.
A diagnosis is usually made if you have experienced 1 or more of the following symptoms regularly for a month:
- delusions
- hallucinations
- hearing voices
- incoherent speech
- negative symptoms, such as a flattening of emotions
You may be diagnosed if your symptoms have an impact on your ability to work, study or perform daily tasks.
The psychiatrist, or mental health team member, will rule out other possible causes first. For example, drug use or bipolar disorder.
Related mental health difficulties
Sometimes it might not be clear if someone has schizophrenia.
If you have other symptoms at the same time, you may have a related mental difficulty. This could be bipolar disorder or schizoaffective disorder.
Bipolar disorder
If you have bipolar disorder, you may have periods of elevated mood followed by periods of deep depression.
You can go from very active, excited behaviour (mania) to being very low and depressed.
You may also hear voices, experience other kinds of hallucinations or have delusions.
Schizoaffective disorder
Schizoaffective disorder is often described as a type of schizophrenia. The symptoms are like schizophrenia and bipolar disorder. But schizoaffective disorder is a mental health difficulty in its own right.
It may happen once in a lifetime, or come and go. It can also be triggered by stress.
If you show signs of schizoaffective disorder, you may also be assessed for:
- post-traumatic stress disorder
- depression
- anxiety
- substance use (for example, drugs or solvents)
Getting help for someone else
People with schizophrenia may not want to visit their GP. They may believe there's nothing wrong with them. This can be caused by their delusional thought patterns.
A person having an acute episode may refuse to get help. In this case, their nearest relative can ask for a mental health assessment.
Someone who had acute episodes in the past may already have a community mental health team (CMHT). If this is the case, contact them to express your concerns.
In some cases, the person may have left instructions about what they would like you to do if they have another episode.
For a worsening episode, you may need to go to the emergency department (ED). A duty psychiatrist will be available.
In certain circumstances, the person may have to be admitted to hospital against their will. This is called an involuntary admission.
After diagnosis
If you are diagnosed, you may feel anxious about what will happen. You may feel frightened and withdrawn.
But it's important to remember that a diagnosis can be a positive step. It can help to get information about schizophrenia and the types of treatment and services available.
Diagnosing children and young people
Children and young people with a first episode should be urgently referred to a specialist mental health service. For example, child and adolescent mental health services (CAMHS).
Content supplied by the NHS and adapted for Ireland by the HSE