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The infected areas will become red and start to itch if not cleaned within 12-28 hours after touching the poison sumac. Depending on the person, the infected area can have red streaks or just a red colored area. Hives can appear, and so can fluid-filled blisters. (This answer provided for NATA by the California University of Pennsylvania Athletic Training Education Program.)
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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.