Often during summers in the tropics, especially under intense heat conditions, we get a skin condition medically referred to as "miliaria." It comprises of reddish rashes with several tiny boil-like eruptions. These are not harmful and go away once the heat dies down but are mighty irritating.
People generally apply talcum powder for some temporary relief. I need to know the most commonly used term for this condition in America. Wikipedia gives terms like "prickly heat," "sweat rash," and "heat rash." Which of these, if any, would an average American prefer?
Here's an image for illustration: