Someone who develops psychosis will have their own unique set of symptoms and experiences, according to their particular circumstances.

However, four main symptoms are associated with a psychotic episode.

They are:

• hallucinations
• delusions
• confused and disturbed thoughts
• lack of insight and self-awareness

Hallucinations
Hallucinations are where a person perceives something that doesn’t exist in reality. They can occur in all five of the senses:

sight – someone with psychosis may see colours and shapes, or people or animals that aren’t there
sounds – someone with psychosis may hear voices that are angry, unpleasant or sarcastic
touch – a common psychotic hallucination is that you are being touched when there is nobody there
smell – usually a strange or unpleasant odour
taste – some people with psychosis have complained of having a constant unpleasant taste in their mouth

Delusions
A delusion is where a person has an unshakeable belief in something implausible, bizarre, or obviously untrue. Paranoid delusion and delusions of grandeur are two examples of psychotic delusions.

A person with psychosis will often believe an individual or organisation is making plans to hurt or kill them. This can lead to unusual behaviour. For example, a person with psychosis may refuse to be in the same room as a mobile phone because they believe they are mind control devices.

Someone with psychosis may also have delusions of grandeur. This is where they believe they have some imaginary power or authority. For example, they may think they’re the president of a country or they have the power to bring people back from the dead.

Confused and disturbed thoughts
People with psychosis often have disturbed, confused, and disrupted patterns of thought. Signs of this include:

• rapid and constant speech
• random speech – for example, they may switch from one topic to another mid-sentence
• a sudden loss in their train of thought, resulting in an abrupt pause in conversation or activity

Lack of insight
People who have psychotic episodes are often totally unaware their behaviour is in any way strange or that their delusions or hallucinations are not real.

They may recognise delusional or bizarre behaviour in others, but lack the self-awareness to recognise it in themselves.

For example, a person with psychosis being treated in a psychiatric ward may complain that their fellow patients are mentally unwell, while they’re perfectly normal.

Postnatal psychosis

Postnatal psychosis, also called puerperal psychosis, is a severe form of postnatal depression, a type of depression some women experience after having a baby.

It’s estimated postnatal psychosis affects around 1 in every 1,000 women who give birth. It most commonly occurs during the first few weeks after having a baby.

Postnatal psychosis is more likely to affect women who already have a mental health condition, such as bipolar disorder or schizophrenia.

As well as the symptoms of psychosis, symptoms of postnatal psychosis can also include:

• a high mood (mania) – for example, talking and thinking too much or too quickly
• a low mood – for example, depression, lack of energy, loss of appetite, and trouble sleeping