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Category: 醫療健康

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鼻涕（又稱為鼻水）是指鼻中的粘液。鼻涕由鼻粘膜的杯狀細胞分泌，功能在於保護呼吸道。鼻涕的分泌是持續性的，但因鼻腔與食道相通，所以一般都在不知不覺中被嚥下。
呼吸道中粘液分泌增加是許多常見疾病，如感冒...