You have a blisters because slave and peroxide aren't the best thing to put together,it can cause the cut and skin to become iretated and form blisters. What you should do is keep a bandaid on your blisters and keep them clean.
Why Do I Have Blisters Around My Open Cut?
It could be from a mixture of wound care products, or an allergic reaction to the band aid either from the glue on the band aid to the material it is made from. Try using basic gauze and paper tape found in the same area as the band aids.