This could be a lot of things. She might have a stressful home life that causes her to cry at the office. Bipolar disorder is a damn complex thing and just because someone has a few "blow ups" doesn't automatically make them bipolar. Likewise, just because someone DOES have bipolar doesn't automatically mean they're a ticking time bomb.

The stigma surrounding it is awful. I spend a great deal of time and energy concealing it just so that I don't have someone nit pick my every comment or action.