Some types of depression have special traits or develop under special circumstances, for example:
- Persistent depressive disorder (Dysthymia): A type of depression that extends over a long period of time. The depressed mood and other depressive symptoms last for at least two years.
- Postpartum depression: When a depressive episode occurs during pregnancy or after delivery. Read more about What is postpartum depression.
- Psychotic depression: A severe type of depression in combination with delusions or hallucinations, for example seeing or hearing upsetting things that others don’t perceive.
- Seasonal affective disorder: When the onset of depression is triggered by seasonal changes. Typically, this type of depression returns every winter and lifts during spring when there is more natural sunlight.