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학습 자료 둘러보기 →The rash of scarlet fever is a blanching, erythematous eruption with a sandpaper-like texture. It typically appears 12–48 hours after the onset of fever and sore throat.
To test for blanching, press a clear glass against the skin; the rash will temporarily turn white or pale. Associated findings include circumoral pallor, a strawberry tongue, and Pastia's lines (linear petechiae in skin folds).
A non-blanching, petechial rash is a red flag requiring urgent evaluation for meningococcemia or other vasculitic processes. Do not confuse this with the blanching rash of scarlet fever.
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