I don't know what the problem is with my foot, I do NOT want to go to the doctors or walk in centre as I have had bad expieriences there. I have a swelling the size of a one penny piece red/purple in colour with no obvious centre Its on the back of my foot just bellow my ankle, above my heal, left foot on the inside. It has a sharpe stinging pain, like I stood on a wasp. Dad said it may be a veruca, they have a centre thats yellow don't they? Could it be a boil or sist, aside for paracetomol and alchol is there an anistetic i can get so I can contiue to drive and walk? I have had this problem for about a week its getting worse so I can't WALK on it, do you think it will get better on its own?