I have a some chronic pain problems, so if some one sees me flinch when i move too fast or wrong and ask if I huurt, I say brightly with a big smile "all the time!" and move on to another topic. A number of my colleagues know i am biploar also, so I think when I get a solitious questio occassionally, it is more that they are wooried what the extra stress of the pain, if it is a bad week, may affect my mood. Thank God, my problem is one that has a tendency to fade over time,and so it hasn't been as severe lately. I just treat the questions the way I would any other kind question about my health. HUGGGSSS
PS What a pill of a colleague! She must be driving the rest of the work force out of their minds! Maybe they just figure that you are like the canary in the coal mine, no offense meant. They might be able to cite her as a problem for you and move her out on those grounds.