Painful Redness

So I'm a bigger girl. With bigger girls. And I pump and feed but the last couple days a slight annoying burn under my girls. Well today it was really bad so I looked in the mirror under them and it's bright red bumpy and extremely sore and burns to the touch. Essentially it reminds of when my thighs would rub together in the summer. Unfortunately my nursing bra rubs on it constantly and is absolutely excruciating. Is there anything I can do for it that won't make me lose milk or compromise my supply.