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miliaria (mil″e-arŽe-ә) a skin condition associated with obstruction of sweat ducts, resulting in sweat retention, rupture of ducts below the level of the obstruction, and extravasation of sweat within the skin. The three most common types are miliaria crystallina, miliaria rubra, and miliaria profunda, distinguished according to the level of obstruction; they are seen primarily in infants, although they sometimes occur in adults in hot, humid conditions. miliaria rubra. miliaria crystallina
miliaria in which the sweat escapes in or just beneath the stratum corneum, producing noninflammatory vesicles which, because of the thinness of the layer covering them, have the appearance of clear
droplets. Called also sudamina. miliaria profunda
the deepest type of miliaria, with occlusion of the ducts at the dermoepidermal junction. It occurs following severe, recurrent miliaria rubra, usually in hot, humid climates. Because large numbers of sweat glands are inactivated, it can lead to heat intolerance or heat stress. miliaria rubra
miliaria in which the obstruction is deep in the epidermal layer, with rupture producing itchy red papules and blisters. The
severity of the symptoms varies with the heat load of the individual. Treatment is directed at reducing sweating by reducing
the external heat load and avoiding irritating agents and tight clothing. Bland powders may be helpful. Called also heat rash and prickly heat.
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