Mine came on about two years ago so it doesn't manifest itself untill whenever it feels like it. Maybe I've been lucky in that respect, I'm not a stress head and I know that can bring it on. Wierdly, I think mine started after I had a bout of gout and the anti inflammatories were different to the ones you now also take. They withdrew them and I've suspected the old ones caused a bad reaction. Teach me to drink too much ale and red wine and eat too much red meat, I might never have had it otherwise! I've got a good angle on my mortality so once I knew something was up I pestered to get it looked at, others might not. Took a couple of GP visits before one agreed I should see a specialist, one just shoved his finger up my jacksie and shrugged essentially!! It's now well under control, the initial steroids were a ****er as you put a bit of weight on but not too much, now it's just a couple of the others a day.