Cover the blister with an antibiotic ointment like polysporin or bacitracin and a band-aid. Change the band-aid once a day, or more frequently if there is significant drainage of fluid.
An anti-blister balm for localized protection I've never personally used this, but there are a ton of positive reviews on Amazon about how well this works (627 out of the 1,465 reviews have five ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results