Lilly has one toe which is bent at a funny angle, I noticed it once when clipping claws, it wasn't like that the previous time I was clipping her claws though! She was/is young so I assume she caught it and broke it, but she never once limped with it so I don't think it ever caused her much pain and it definitely doesn't now it just makes it trickier for me to clip that claw because I have to get at a funny angle!
As it's recent then it could be a break, to maybe as others have said related to arthritis, either of those are likely to be uncomfortable though so might be best to have some pain relief, either long term if it is arthritis, or just short term if it is a break