It is a personal decision to tell your manager. Some people do and all is fine. When I was working I told my manager and it was cool. I really didn't have a problem telling the one's who were close to me. Even though I was nervous and afraid they wouldn't except it. I have one sister that embraces me and will listen about my bipolar problems as well as others. I think for the rest of the family they just rather not think about it. My husband also knows and has been very supportive. It took all those years of mood swing and gave a reason to them. My oldest daughter knows as well and she is very accepting. So you really don't know how people will react until you tell them. If you do I would start with the people closest to you.