Ok i have these really weird looking pimples that i think are boils. But the even weirder thing is that they only appear on my stretchmarks!

Some stretchmarks are small, others are large (like 2cms in width) The large ones get larger boils the smaller ones get smaller boils, they dont even go outside the stretchmark at all. What's going on? Am i a freak?

Oh and they also hurt like all mighty. They have a pussy head looking thing in the middle and if i even rub my finger across it, it really hurts. And i only even get 1 maybe 2 at a time. Usually on my hips (where the big ones are) and my tummy (where the small ones are).