Which physical findings suggest miliaria rubra?

Updated: Mar 27, 2020
  • Author: Nikki A Levin, MD, PhD; Chief Editor: Dirk M Elston, MD  more...
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Answer

Lesions are uniform, small, erythematous papules and vesicular papules on a background of erythema.

Lesions occur in a nonfollicular distribution and do not become confluent.

In infants, lesions occur on the neck and in the groin and axillae.

In adults, lesions occur on covered skin where friction occurs; these areas include the neck, scalp, upper part of the trunk, and flexures. The face and volar areas are spared.

Lesions may occur in erythematous patches similar to sunburn. [28]

In late stages, anhidrosis is observed in affected skin.

See the image below.

Miliaria rubra in an adult. Courtesy of K.E. Greer Miliaria rubra in an adult. Courtesy of K.E. Greer, MD.

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