Heat rash or miliaria is a bit odd in that you get small bumps (~ 2mm) or papules that are elevated but do not break the skin surface. A few seem to have a clear centre (vesicle). After a while they subside and then eventually go away on their own, but then patches may appear in other areas, randomly bilateral. They may be itchy but not overly, and not painful. These cases are so personal it’s hard to generalize.
