Girls, please tell me, what kind of rash is on my baby's bottom, and i…

Girls, please tell me, what kind of rash is on my baby's bottom, and it's been peeling. I think the soap didn't work, we stopped washing with soap, it's not going away much, but only peeling, I've been applying Bepanthen and Moomatt cream, and we use powder, nothing helps at all, the peeling goes away, but red spots appear on the bottom, they just get brighter and some kind of film-like covering ? What can be applied effectively? Or maybe it's better not to touch it at all? Just apply powder to dry it up?