In reply to TimSter:
In reply to RupertD:
Thanks both for your replies.
I can achieve 95% extension naturally. 100% is possible although this requires me to focus on deliberately extending the finger further. I assume this is what you mean by 'lag'. However, it might, to an extent, be due to a prior injury many years ago. No problem isolating finger and lifting it off the table. No laxity in either joint in straight or claw position.
A week on from the point of injury the finger definitely feels better. However, there is still obvious pain due to the damaged collateral ligaments at the PIP joint. Making a fist and full extension is possible with no pain (except to collateral ligaments if I tighten at full flex) and in general the finger feels mobile.
However, 'popping' still occurs on occasion when flexing after full (not 95%) extension, also when extending. The noise still seems to be coming from the posterior side of the middle phalanx and towards its PIP - as opposed to DIP - end. This seems to fit with a diagnosis of either inflammation to around where the central extensor tendon inserts to the middle phalanx; to where the lateral bands pass over the collateral ligaments; or perhaps to inflammation of the ORL?
I guess in either of these cases the key to recovery is rest - cold water therapy - followed by slow return to use with hand exercisers and then climbing. But it would still be great to know what causes the popping and if causing it to reoccur irritates the tendons/ ligaments further?
Post edited at 16:14