Have you ever had a problem with no solution?

I want to run long distances but no matter what I do I keep getting tendinitis. It is going on five months now, and it won’t go away completely. Even if I stop running for a few months and wait for it to heal 100%, it will almost certainly just come back. I have gone to the doctor twice and he can’t fix it.

Have you ever had a problem that couldn’t be solved? What was it? How did you deal with it?