nappy rash?

[Visitor7]

DD has developed a red rash in the genital area. It doesn't look like a rash as such, just really red, and she's very irritable. Hates it when we put a nappy on her. We tried using baby powder, bepanthem & sorbelene but these have all flared it up. Everytime she needs to wee or poo she screams. What else could I try? E