cystic acne from stridex? [Acne]

hey all, i just started the nuvaring and then ended up with little acnes. so i started using stridex in the red box on my problem areas. it got rid of the little bumps (closed comedones i think) but i then started getting cystic acne in those areas. it started with one but now i have several deep, painful cysts. i tried a hydrocolloid bandage but now i have even more cysts... any recommendations? anyone experienced this before?