Boob rash

Rachel • FTM. 11/20/15❤️
So this may be kinda weird, but before I got pregnant my breasts were a C cup. Now I'm a DD. Before I got preggo, my breasts didn't touch in the middle to create cleavage but now they do. I'm getting kind of a small, itchy red patch between my breasts. Anyone have this or know of a product that will help it go away? I use lotion/ lavender Belli oil 2x a day.