Has anyone ever had this? I'm a fairly flabby 16 and have a not-lovely roll of 'apron' from my pregnancies. I have generous stretch marks on hips, top of pubic area and on the lower part of my stomach/'apron' area. The stretch mark areas feel very soft and thin-skinned, precisely as you'd expect from skin that's stretched beyond repair and lost its collagen. 
Here's the odd thing. I recently noticed a little area of tiny pinhead pimples on hips and managed to squeeze a couple. They appeared to be blocked pores and there was some white stuff inside like blackheads. I'm a veteran of blackheads on the nose, cheeks, even the odd one on my shoulder, but it freaked me out finding ones on my HIPS! 
I noticed a similar looking area on the very soft and thin skin sort of underneath my saggy tummy, just above my pubic hair. When I applied very gentle pressure there was quite a lot of soft white (and cheesy - noooo!) stuff that just shot out. It looked as if it'd been 'stored' in a stretchmark. This is really weirding me out. I thought they were just stretched areas of skin, not little pockets of (potentially) cheese. I'm a veteran sporner but this has really freaked me out. And I've made a sore patch from squeezing the very delicate skin, which is now oozing and red, so generally I'm feeling a bit disgusting.
I wash daily and everything!