miliaria crystallina
Pronunciation: mil-ee-AR-ee-ah kris-tah-LEE-nah
The mildest form of heat rash, presenting as tiny, clear, superficial vesicles that rupture easily.
Full Definition
Miliaria crystallina is the most superficial and mildest form of miliaria (heat rash), occurring when eccrine sweat duct obstruction develops at the level of the stratum corneum. In pediatric patients, particularly newborns, this condition presents as numerous tiny, clear, thin-walled vesicles that rupture easily with minimal trauma. The lesions are typically asymptomatic and most commonly affect covered areas such as the chest, back, and neck. Unlike deeper forms of miliaria, there is no associated inflammation or pruritus. Proper documentation includes distribution, lesion morphology, and triggers such as excessive bundling or febrile illness.
Usage
Usage note: Distinguish from miliaria rubra by lack of inflammation and deeper involvement.
In Context
- "The newborn's chest showed typical miliaria crystallina with tiny, clear vesicles that ruptured easily." — neonatal examination note
- "Counseling focused on preventing miliaria crystallina through appropriate clothing and temperature control." — parent education documentation