I messed up my right index finger a bit, back at the start of Nov. It didn't get better. Very sore at the knuckle, when carrying a cup of coffee, pinching, extending up or typing. Thought it might be a bit of arthritis. Bit of a lump out of the side, towards the thumb. Lump is visible.
6 weeks on, it is getting worse. So I see the physio at work.
Not arthritis, joint space too well preserved. Either fracture of metacarpal that hasn't healed or torn transverse metacarpal ligament that isn't healing. Referral to hand surgeon/specialist.
Bugger.