Girls hello! The child has strong redness between the shoulder blades …

Girls hello! The child has strong redness between the shoulder blades every day several times a day we try to dry it off with Bepanthen Biolan cream Sudocrem I don't see any special results( Can you tell me who has encountered this and how they treated it? The child is clearly suffering from me, I can't get through it at all, not using powders, could powder help? Or what to dry with, please help, thank you