3. Prickly Heat

Prickly heat or miliaria rubra causes tiny, raised, red spots that create a prickling sensation. The rash develops when sweat blocks the pores. Though prickly heat may appear anywhere on the body, it primarily occurs on the neck, chest, thighs, face, and back, generally after a person has spent an extended period of time in the sun. The best way to prevent prickly heat is to wear loose, breathable clothes and avoid exposure to direct sunlight.

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