@hawkssr I am sorry to hear you had the side effects you described. While it is topical, fluorouracil is a chemo drug. Our skin is our largest bodily organ, and we do react/respond to so many stimuli presented to it.

I wonder if what you experienced could have been caused in part of the job the drug was doing? Was it successful in treating the reason you were using it? For me, I sometimes need to consider the reactions versus the benefits of a medication.
Ginger