When: Present day
Where: New York and Denver
Searched: Combinations of disease+controversy+disorder+misunderstood; also browsed various medical categories at Wikipedia
My character needs a secret health issue along the lines of President Bartlet's multiple sclerosis from The West Wing.
Now, my guy is a fifty-ish white male who is not visibly sick. His job isn't physically demanding and he's in public view, but he's not exactly a celebrity. (Think politician/news anchor/talk show host. That kind of public view.) He's an opinionated, somewhat polarizing figure.
As for his health issue, he's know about it for between three and ten years, but he has kept the information secret because his disease is widely misunderstood or controversial. Physical and mental illnesses are both acceptable, but whatever it is, it's preferably not going to kill him or make him quit his job in the near future. He has money, so he can afford treatment to keep him up and running. For what it's worth, I've been contemplating HIV, but I thought I'd look for other options first.
Overall, I'm pretty flexible as long as there is some sort of controversy, stigma, or misconception relating to his health problem. It has to be something that will make people, particularly people in the media, talk, but not in an, "Oh, poor guy," kind of way.
Thanks for your help! If you need more information, ask away.