The word 'psychosis' is used to describe experiences in which there has been some loss of contact with reality. The person has difficulty telling the difference between what is real and what is imaginary. It is quite common, 3 out of every 100 people have an episode of psychosis at some point in their lives.
Psychosis is associated with a number of different conditions which range from drug induced episodes to mental illnesses such as schizophrenia, bipolar affective disorder (often called manic depression) and severe depression.
The experience depends on the individual and, to some extent, on the diagnosis with which it is associated.
It is very important to seek help as early as possible when psychosis or a relapse of psychosis is suspected.