I use overlap vardon grip. I wear gloves in both hands ostensibly to prevent blisters at the base of my fingers on the palm side of the hand.
HOWEVER THIS TIME the blisters came into my left forefinger. Blisters on left forefinger at the dorsal side of the hand.
Specifically blisters are at the first joint and second joint of the forefinger. Left hand forefinger.
Presumably the blisters occured due to vardon overlap pinkie finger of the right hand.