Why is there a warm red patch on my leg with dark red dots which have a little bit of pus?

WHEN I WAS 9 YRS OLD I HAD BIG DOME LOOKING BUMPS ON MY LEGS THAT WHERE FILLED WITH PUS, AND I RAN A VERY HIGH FEVER. WELL WHEN I WAS TAKEN TO THE EMERGENCY ROOM THE DOCTOR SAID I HAD FIRE CHICKEN POX OR SOMEWHAT LIKE THAT.