You don't want to pop a blood blister just leave it alone. You can put a wrap or bandaid Keep it clean and don't rub it.
do not pop the blister...its natures way of protecting the skin underneath. Skin repair is a product to wipe over blister to try and assist keeping it intact until it breaks on its own...When it does break keep it clean with soap and water and bandage if bleeding. CHange dressing daily until skin is heeled with no more drainage.