Oh I used to get those milk blisters allll the time at one pint. They were so painful! If massaging isn't working, *****ing the blister with a sterlised needle usually did the trick for me (or you can get the doctor to do it if you're squeamish). The relief when all that banked up milk flowed out was amazing LOL! Annoying how a tiny bit of grown over skin can cause so many hassles.