Hello, my daughter is 6 months old and has some little red pimple like bumps on her butt by her butt crack and close to her vagina. Its not all over, just here and there. They have white in the middle like they are just little pimples, but they aren't going away. I have been putting desitin on it, but its not helping. Does anyone know what this is? Is it just a diaper rash, heat rash, or is it from the moisture? Has this happened to anyone else? Any input would be appreciated. Thanks!