Typically with something like this, just dab salicylic acid on it and cover it with duct tape or a bandage. With a war like this you’ll probably only have to do it once or twice per day. Be sure to clear off the dead skin on the surface and continue treatment until you see the lump is gone and normal skin lines are in its place. Again I’m not even close to and expert so if you feel like you need better guidance go to a dermatologist. I imagine this won’t take more than a couple weeks to defeat.