Diaper rash white dots⁉️⁉️⁉️⁉️

Rachel

LO had a diaper rash on and off all summer. I change her every other hour but I guess bc it's hot out....anyway, pediatrician said it's not yeast, just irritated and to try putting Butt Paste on. Within 24 hours I noticed there's little white dots that don't wipe or wash off. Help 😳