Just keep putting a thicker barrier on it and keep him as dry as possible so it doesn't rub as much. The barriers like desitin or a&d will still help it feel better even if it isn't a normal rash. The diaper free time will help a lot too! If you think of getting a chaffing on yourself....naked feels the best! Nothing touching it.
See but this isnt a diaper rash, its like a chaffing from the edge of the diaper. Resinol isnt helping much and neither is neosporn. Just slowly taking it away? luckily ot doesnt hurt to the touch anymore
My daughters doctor actually gave us an antibiotic for this! It went away like that.