Weird Diaper Rash

Am

My son has had this weird rash for a couple of days now and I’m running out of things that to try.

Baking soda bath didn’t help, oatmeal bath didn’t help, diaper creams (buttpaste, desitin and penaten) aren’t touching it, Aquaphor isn’t helping. It looks like it’s painful but he doesn’t seem bothered by it. He’s in Huggies little movers but has been for a couple of weeks with no issues before that he wore snugglers. And its only by his balls.