Have searched the other A1 topics, no dice (and one had an article to useful stretches with missing images).
3 weeks ago I slipped on some gravelly bollox on the scramble down to Quarry 3 in Avon's Leigh Woods, whacked and bruised my arse, and also impacted my right hand / main finger. It felt a bit sore at the time but not very sore and wasn't sore climbing nor after climbing.
From 2 weeks since then it's been feeling progressively more sore in an area near the A1 pulley area in my palm, in the first inch downwards from the base of my finger, slightly more towards the little finger side / away from the thumb. It's sore to touch, sore to stretch (and feels tight), sore to fully clench a fist (but less sore to just clench the main finger)
Climbing-wise, it's more painful full crimping and pinching (with some additional pain around the knuckle), and grasping any rod-like implement. It feels fine open-handed, dragging, camming into finger cracks etc. Basically it feels a little bit like an A2 injury in what aggravates it, except there's only a tiny bit of tenderness around the A2 compared to the A1 area.
The only think I can think to do is massage some voltarol gently into the area to reduce inflammation, and cross-tape it as for A2 to reduce crimping... Any other help / advice appreciated.