Moleskin - . Don't pierce the blister. Cut a pad of moleskin (or other tape) that will surround the blister by 1/2 inch all round. Cut a hole in the middle of the moleskin to accomodate the blister. Place moleskin "doughnut" over and around blister. Tape over moleskin and blister. Now the moleskin takes the pressure, and the blister is still covered.