Looking to understand

[Neoma]

2. It's her choice to seek help if needed.

Bipolar is going high in mania then low in depression. She could have rapid cycles I suppose. But depressed people usually want to be left alone, it isn't usual to scream their head off about something. And mania is a high that gives bliss... Sometimes. It depends on the person. This sounds like an outburst problem. Anger management issues.

She might have something, but leave the diagnosis to doctors.

Mental illnesses can be either intermittent or managed. It depends on the illness.