The miliaria rubra rash looks like reddish papules and vesicles. The lesions most commonly appear on the upper trunk, forehead, and areas where skin comes into contact with other areas of skin like the armpits, neck, and groin. Taking measures to cool off and dry off resolves this type of rash.

What does miliaria look like?

Miliaria crystallina is the most common and mildest form of heat rash. If you have miliaria crystallina, you'll notice small clear or white bumps filled with fluid on the surface of your skin. These bumps are bubbles of sweat. The bumps often burst.

How would you describe miliaria rubra?

Heat rash (miliaria rubra), also known as prickly heat, is a rash of small red bumps caused by blockage of the sweat glands. It can be due to high fever, excessive sweating, or being over-bundled. It is commonly seen in hot, humid tropical climates.