Psychosis is a mental state in which thought and perception are severely impaired. Individuals that experience a psychotic episode may experience hallucinations, hold delusional beliefs, demonstrate personality changes and exhibit disorganised thinking. This can be accompanied by a lack of insight, difficulties with social interaction and impairments in carrying out daily living activities. A psychotic episode can be described as a loss of contact with reality. The treatment of psychosis will depend upon what associated diagnosis may be present. However, the first line of treatment for psychotic symptoms is usually antipsychotic medication, and in some cases hospitalisation. Cognitive behavioural therapy can also be effective in managing the psychotic symptoms.