Have you been doing regular push-ups for very long? Moving to diamonds too fast could be rough on your wrists and shoulders.
I used to do knuckle push ups to avoid wrist pain for the longest time but started doing wall and counter top push ups, along with short sets of regular push ups to condition my wrists more, now I don’t have any pain doing these at all. It wasn’t long ago I had a wrist brace on and couldn’t touch my guitar… Sad times.
It could be worth it to go back some steps in terms or difficult movements to let your wrists catch up to the rest of your body.