It's not an obvious type of thing, but a condition that will remain and require medication for life and is difficult to regulate, therefore there will be good times and bad... But it is affecting my performance, and I'm finding it harder and harder to cope with the workload, and even to find the energy to interact effectively with my colleagues, and I know that it will be noticed sooner rather than later, if not already.
I'm hesitating because what I did mention this to the manager of the project I was on at the time I was diagnosed, to be met with ''oh ya, my mother has that'' and I was then cut off short. My direct manager has very little to do with my day-to-day work, and I can't see any huge benefit in telling him either. I also want to avoid a situation where I am by-passed for certain projects or responsibilities as a result, but then, if I don't let anyone know why I'm coping less well than I used to, that it may be interpreted as just having a bad attitude.