What Is Atypical Depression? | Betterhelp

Here is a quote:

"Mood Reactivity

Mood reactivity means that you react to positive events with positivity, even though you are depressed. While a person with a typical depression continues to feel bad no matter what happens, a person with atypical depression can feel happy when something good happens."

BTW here is an interesting article that covers all the recognized forms of depression, including atypical.

The Different Faces of Depression | Psychology Today.