I strained a tendon or something in the joint of my left elbow, and it hurt for like 2 weeks. I let it rest, now whenever I do any excersize it gets annoyed and starts hurting.

I just work through it.

It never gets nearly as bad as it was the first time, and it never gets worse than a specific "uncomfortable" feeling, so no big deal I figure.

Probably some stuck scar tissue or something.