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Insect bites swell and get hard due to the human body releasing histamine in response to insect saliva containing anticoagulants. The more you itch the worse it gets, as the body thinks that you need more antibodies to attack the anticoagulants.

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9y ago
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14y ago

they hurt because the bugs put a certain kind of chemical that make your blood all weird, idk what that chemical is called- sorry.

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Q: Why do insect bites go hard and swell up?
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