What Causes Small Spotted Rash On The Stomach?

About 3 months ago i noticed a wierd small spotted rash on my stomach over ribcage n then a couple days later i noticed the same thing on my side the spots vary in size, it doesnt it. bt i cnt tell if becuz ive gained a little wait they seem to have gotten bigger and somedays it looks darker and more pronounced that others. i did have contact dermatitis during this time on the lower part of my legs and on anckles this lasted a couple weeks, it was while i was at a rehab in michigan the facility was running on well water and there was a manmade lake we swam in, mosquito bites were daily. i also have been diagnosed with hpv over the last year.