Wat is the best treatment for heat rash?

Heat Rash Treatment: Since heat rash is essentially a sensitization reaction to "heat" the choice of treatment is to allow the natural healing of the skin and an avoidance of further exacerbations (more sun, scratching, chemicals, etc) common treatments involve mild cortisone or other corticosteroid creams, cool environment, and avoidance of tight or occlusive clothing articles. Goes away on its own even doing nothing.