I am 51 and have gradually been getting pain in one finger in particular. It can flare up for no reason, but it can also be as as result of doing something arduous (eg. I was flattening thick card board packing boxes which were staples together)

When I look at my finger I think it's starting to take in that tell tale arthritic look so I suspect this is what it is. I don't seem to have it in any other fingers or hands yet.

Do be I need to see a doctor? What can they do?