Sorry your little one is having diaper
rash. My first daughter got diaper
rash when I tried being fancy and bought her Huggies Supreme. I realized she was allergic to it and I switched her to LUVS. I've always used this powder call Caldesene, its in a pink bottle and you can find it in any CVS or Walgreens. It is so good it formulated to keep moisture away from their skin. You can use it on prickly heat too.