Miliaria rubra is a type of heat rash or prickly heat that happens when sweat becomes trapped under the skin. Children tend to get it more than adults because their sweat glands are still developing.

These occur when the sweat duct opening on the skin’s surface is blocked. Miliaria rubra is also known as the "prickly heat," and this is shown through “small, inflamed blister-like bumps and ...

Heat rash is also known as prickly heat, sweat rash, or miliaria rubra. Although it can appear anywhere on the body, heat rash often appears around skin folds, including: in the neck near the ...