Not necessarily does it mean hes bi polar it's a possibility of depression As well or just a hormone imbalance try vitamin b12s n stuff as well as tryin to possibly change your diet there's a number of things but bipolar is somethin your born with and can tell when your younger my mom has it and struggled with it her hole life and still is but I'd see a doctor and talk to them bout vitamins or even depression!!!
& the next minute you're yelling n screaming?.. Sounds like you are bi polar
Yeah, I read your other comments, maybe you should rethink enlisting