Bryan (Ottawa, Ontario) on 06/08/2020:

I tried using a dandruff shampoo with the active ingredient selenium sulfide 1% or more on my heat rash on my legs and foot and am amazed at how well it works. I spread the shampoo on my affected areas, let it set a while as I go about other things, like brushing my teeth and shaving, then step into the shower to rinse it all off. Each day I am seeing marked improvement.

In my particular case I am using head and shoulders shampoo. It seems to be helping the fingernail fungus I have on the hand I use to apply the shampoo to the other areas. For what it's worth. I was inspired to try this as I saw people on youtube who were using selenium sulfate shampoos for other skin problems and having good results.