I was going to say yesterday, when I read this, that it sounded like skin eczema to me and use a little cortaid or other cortisone cream, however, it says on package not to use without Dr's ok and especially on a baby that young. But now, that other's have suggested it, I am almost certain it is. I had severe skin eczema as a baby, outgrew it until 12, still struggle with it today but have discovered hormones has alot to do with it. My oldest sister had it as a baby and never got it again. My four children have all had little breakouts at one time or other. With skin eczema it will appear the worst in sweaty spots. Like the other Mom said, I did not want to use any cortisone on my little ones, either, however, there was nothing else on the market and I used it very sparingly. A little dab goes a long way, but I would try it. It could clear it up overnight and may not be a chronic condition. Best of Luck