Miliaria

Excerpt

Miliaria, also known as eccrine miliaria, is a common skin condition caused by the blockage of eccrine sweat glands and ducts, leading to the backflow of eccrine sweat into the dermis or epidermis. This backflow results in a rash comprising sweat-filled vesicle formation under the skin.

The 3 main types of miliaria—crystallina, rubra, and profunda—are classified by the depth of sweat duct obstruction, which leads to different clinical and histological presentations. Miliaria is often referred to as "heat rash," "prickly heat," or "sweat rash." This condition is most prevalent in warm, humid climates, especially in summer. The rash is typically self-limiting and usually resolves without treatment (see Image. Miliaria, Skin Disease).