I've had this raised line on my finger for ~ 2 years, and it has slowly gotten bigger. It looks sort of tunnel-like if that makes sense. I always bring it up as something I want to talk about when I see my doctor, but they forget to look at it. Now on the same finger, it looks like another one is starting. It is still very small though. Any idea what this may be? Or a list of possible things it could be. Not painful. Feels hard to the touch, and is slightly more pink than the skin around it.