Does fungal rash go away by itself?

Sometimes. Its possible for fungal rashes (of the feet, genitals, or body) to go away by itself, but eradication and symptom relief will come much faster with topical antifungals.
Yes. But beware.Many fungus rashes are going under your skin to erupt again somewhere else.Treat a fungus-if it recurs go to your dr and get stronger medicine.Tell dr what you have already used.