Blisters

Hey,

Over this last season, I have been developing blisters on the middle finger of my throwing hand. It started with a blister and then the skin has ripped open and is barely hanging on. It has caused a few of my starts to be cut short. Does anyone have any ideas of how to develop tougher skin? I’ve heard of using super glue to cover the blister, has anyone had any experiences with this?

Any help is appreciated,
Thanks