Psychotic depression is major depression along with psychosis. Psychosis involves a break with reality – you experience hallucinations or delusions of things that don’t exist, often related to your depression. Hallucinations can involve any of the senses – hearing, seeing, touching or smelling things that aren’t there. Delusions involve false beliefs about yourself or situations you find yourself in, for eg, believing you have cancer when you don’t.
This type of depression carries with it a high risk of relapse. It often goes with extreme sleep disruptions.