I'd see a doc...if the finger is cold...it means blood flow is changed. If it goes numb, I'd be concerned.
I usually just pinch the ever loving fuck out of my hands with the flush fitting 1911 mags...got a few nice blisters out of the deal but I save all my hand trauma for Jiu Jitsu and Muay Thai.
Sent from my XT1585 using Tapatalk