Stress, for sure. It's the worst. Especially when something stressful is going on and I'm in limbo, like waiting for whatever it's going to take to end the stress. But it's weird. I'm Bipolar II with mixed states. So the stress can depress me, I start beating myself up for not being "normal" and just living life and not obsessing over the stress, I think that's always the initial reaction. THEN to get out of the depression I will either mix in some hypomanic tendencies, or I'll go full-on hypomanic. So, I think waiting is what triggers me. Waiting for a resolution to a problem, waiting on a phone call with news or an update, waiting for someone to show up. So, waiting=stress. Stress=hypomania and mixed states.