I don't know if it's an allergy...but I tried Bliss, the women's version of DZNuts and there is something in it that made my hind-portions uncomfortably warm for hours afterwards, even after showering. At first I thought it was the tea-tree oil, but I have since tried other products with TTO and no issue.

I would try a different anti-chafe product and see if you still have issues. You may be able to narrow it down to an ingredient or two causing your discomfort.