I have experienced the phenomena. I hate it. It makes me a not nice person to be around. And then the sneaky hate spiral kicks in.

I agree with the above that this is where mindfulness comes in. I actually have a relapse checklist that helps me assess if I am falling into that mindframe and what may be causing it.

Yoga has actually helped a lot in that regard. Because it is all about self acceptance and focusing on the moment and letting go of all thoughts. And let me tell you, with that depression beast on my back getting to that place can be hard work.