Flea: multiple small, scattered welts, especially on ankles and legs.
Spider: central depressed area with redness; observe if it increases in the following hours. Wasp sting: raised welt without a stinger, pain more intense than a bee sting.
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If you experience difficulty breathing, facial swelling, or dizziness after any sting, go to the emergency room.
Note: This post is for educational purposes only and does not replace medical advice.
