In reply to viktal:
I had a similar thing when recovering from a grade 1 pulley tear - other fingers started to feel really sore when pressure was applied to pads. It was weird.
I don't know the cause - but i do know that something that seemed to make a dramatic difference, and has led me to the point of having basically healthy fingers now, was the introduction of finger extensor exercises.
I originally did this as a way of helping the healing process for the pulley tear (strengthening; getting blood into the fingers to aid recovery) as well as having read that this could help prevent future re-injury.
Basically, the human body REALLY doesn't like strength imbalances - which climbing massively creates in the hands because we only ever contract, never expand, our grips with resistance. Finger extensor exercises help you rebalance, and thus avoid injury. This may also explain why I received the unexpected benefits of my fingers hurting less - whatever was being over-strained before is now being betters supported by strengthening elsewhere. An unexpected but hugely beneficial side-effect seems to be an end to the 'sore fingers' problems I was having before, and the full recovery of my pulley problem.
This isn't a scientific result; I offer it merely as anecdote, not data. Perhaps my fingers would have gotten better anyway. But I strongly recommend giving it a shot. You can buy a pack of 3 extensor trainers on amazon for £6, and you can do the exercises whilst watching Netflix - about 15 mins a day max, 3 times a week, seems enough.
https://www.amazon.co.uk/ZOORON-Strengthener-Stretcher-Resistance-Rehabilit...
Post edited at 12:54