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Fav十万个为什么
为什么被蚊子叮起红包？
简单的摘要：被蚊子叮起红包，是因为蚊子的唾液引发免疫反应、释放组胺导致皮肤发炎，以及叮咬部位产生红肿和瘙痒。
1、蚊子的唾液引发免疫反应。蚊子在吸血时会注入唾液，其中含有抗凝血剂和蛋白质，这些物质被视为异物，会引发人体的免疫反应。
2、释放组胺导致皮肤发炎。为了对抗蚊子的唾液，人体会释放组胺等化学物质，导致血管扩张和皮肤发炎，从而形成红包。
3、叮咬部位产生红肿和瘙痒。组胺的释放会使叮咬部位出现红肿、瘙痒等炎症反应，这是人体防御机制的一部分，但也会带来不适。
总结：被蚊子叮起红包，是因为蚊子的唾液引发免疫反应、释放组胺导致皮肤发炎，以及叮咬部位产生红肿和瘙痒。
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