I'm a very honest person. I am diagnosed with bipolar 2.

If I lie it's the same kind as anyone else - I'll lie about how I'm feeling. If someone goes "How are you?" I'm likely to go "Oh I'm well, you?" even when I'm very depressed.

When I'm hypomanic, my impulses tend to make me MORE honest..... I once messaged an ex-turned friend, who lives across the ocean from me, and I ended up going "You know, I want to have sex. If I was over there I would totally be ok with having sex with you right now." Which... is NOT the sort of thing I would ever say normally!

Impulsiveness comes with bipolar. Lying does not, although for some individuals it may come along as part of their impulsiveness. But that's more the person.

It isn't really any different than people who do not have bipolar - some people are honest to a fault, some people lie constantly, and then there are many variations in between.