How To Treat Blister Like Rashes On Leg?

IM 23 YEARS OLD I HAVE THIS RASH ON MY LEG THAT I THINK IS SHINGLES BUT IM NOT SURE IT IS LITTLE SMALLL BLISTERS IN ONE AREA OF MY LEG IT HAS BEEN THERE FOR 2 WEEKS WAS GETTING BETTER BUT NOW MORE BLISTERS ARE COMING UP AROUND IT HOW DO I KNO IF ITS SHINGLES IN WHAT IS CAUSING IT