It depends. It can last a day, a week, a month, or even longer. Consider that it's "just" a mood disorder, where mood management can be affected by random stim

It depends. It can last a day, a week, a month, or even longer. Consider that it's "just" a mood disorder, where mood management can be affected by random stimuli. So, their mood might be stable until some stimulus comes by. And that stimulus could just be a random memory, which can create a feedback loop. It's "fun".