So my rash isn't under my breasts, it's under my belly fold, just above the line of my pubic hair. This fold and I have a long and acrimonious relationship and JUST for happy fun-times this summer, the fold has decided to get irritated and show some signs of intertrigo (bright red, painful skin in areas of skin-to-skin contact that may have an accompanying bacterial or fungal infection). I'm keeping it dry with diaper rash cream and it's mostly under control, except for a small spot of jock itch that I quickly zapped with Tinactin. No more itching, just redness and irritation.
Somewhere, sometime, I remember seeing these c-shaped cotton pads that you could use to absorb sweat in the belly fold area. I didn't buy them, I'm wondering if anyone here knows where I could get some. Right now I'm using the inserts from my totally failed cloth menstrual pad attempt and they work pretty well but purpose-built things might be better.