Three pediatricians told us to use baby oil or vaseline on our baby when we had hard water and she had eczema. It became cracked and bloody. The dermatologist told us that was the worst advice and he called them.
We switch to only baby soap on her privates, let her air dry, and used cetaphil. She totally healed.I trust my dermatologist.
I later had two strange moles? appear on my privates so I went to a female dermatologist. She was the one who biopsied them and rechecked to make sure nothing came back. I did not realize how skin cancer can show up in the privates. It was something else, but I am cured
My husband went to a couple of doctors, not dermatologists. They could not figure out the rash or how to get rid of it. He biopsied it, prescribed the right meds, then later rechecked it. A different rash appeared which did not require antibiotics. We switched detergents and made sure to wash his brace. He is fine now too.
:0)It is painful to watch a child suffer. I would keep in touch with the doctor if you don't see change.