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为什么蚊子叮人会痒？

当蚊子叮咬人类时，它们会注入一种叫做“唾液”的液体。这种唾液中含有一些化学物质，其中包括一种叫做“组胺”的物质。当我们的身体感应到这些化学物质时，会产生一种过敏反应，进而引发皮肤瘙痒的感觉。这就是为什么蚊子叮咬人会引起痒痛的原因。

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