Will Putting Polysporin on a Chest Blister Prevent Keloids or Create Them by Overhealing?

I got the Palomar Lux G to treat the redness left by my chest keloids. I usually get cortisone treatments to flatten them as well. A blister formed cuz the Lux G setting was too high. Should i put Polysporin on the blister to prevent scarring (and therefore even more keloids) or will Polysporin actually create more keloids since it supposedly speeds healing. I wasn't sure since keloids are supposed to be an overactive response to healing so speeding it up didn't sound like a good idea.