I'm dealing with the same thing on two fingers of my right hand. It just popped up late last year. Trigger finger may be hereditary, but the kind of work you do can certainly accelerate it. I thought it was caused by repetitive bending of the finger (imagine pulling a trigger on a gun), but it's actually caused from prolonged gripping of something (steering wheel, rake, PC, etc). I had a second set of cortisone injections two weeks ago. They weren't too bad. Much better than surgery, I'd think, but surgery will probably be the route I'll have to go through next as I've still got the symptoms in one finger
