<unk>  <unk>  is a subtype of Dysthymia and Major Depression characterized by mood reactivity — being able to experience improved mood in response to positive events.  In contrast, sufferers of  "melancholic" depression generally cannot experience positive moods, even when good things happen. <unk> ditionally,<unk>  is characterized by reversed vegetative symptoms, namely over-eating and over-sleeping.
Despite its name,<unk> " depression is actually the most common subtype of depression — up to 40% of the depressed population may be classified as having<unk> .
Atypical depression
Clinical depression
Post stroke depression
Euthymia 
Melancholic depression
Schizoaffective disorder
Panic disorder
Post travel depression