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Mosquitoes don't actually bite - they inject you with six needles that crown their proboscis. Their anti-coagulant saliva is injected into your skin to prevent your blood from clotting, thus making it easier for the mosquito to sip blood. The saliva causes allergic reactions against your skin, which creates the itch. Vampire bats also have the same anti-coagulant saliva.

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12y ago
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Q: How do mosquitos leave an itch when they bite?
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