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咳嗽有痰「吐出來or吞下去」? 醫曝奇效解答了

ETtoday
2025/03/04 | 2分鐘閱讀

記者李佳蓉/綜合報導

天氣多變時寒時暖,好多人感冒,每當咳嗽時,最討厭的就是濃郁噁痰來不及吐出來,不小心滑進喉嚨吞下肚,甚至有家長擔心會引發二次感染。事實上,痰液的產生對人體有益,耳鼻喉科醫師陳亮宇指出,痰是血球與病菌作戰後留下的殘骸,吞下肚不會引發感染,若當下不方便吐痰,不妨把它吞下去。

image

「你居然不知道痰可以吞下去?」陳亮宇醫師在粉專分享影片衛教,痰液的產生是因呼吸道被病毒或細菌感染,與體內的血球作戰後所留下的殘骸。至於吞下肚會不會導致感染?他強調「當然不會!」因痰裡都是病菌的屍體;再者,胃中具有強大幫手-胃酸,可把痰中的病菌全部殺得乾乾淨淨。

image

陳亮宇認為,身處在禮儀之邦的台灣,若出門在外沒有地方方便吐痰時,「不妨考慮吞下去」。他曾在《健康多1點》頻道中提醒,感冒咳嗽時,第一動作務必以手臂或衛生紙摀住嘴巴,將嘴巴完全罩住,避免飛沫噴濺他人。感冒的痰若咳出,一定得用衛生紙包好後丟進垃圾桶,避免痰液經過風化後細菌四散,造成他人感染。

耳鼻喉科醫師吳昭寬接受本刊報導《濃痰、鼻涕網嫌噁!醫驚:是好東西…親揭「5大超神功效」別急止咳》也指出,一般情況下人體每天所分泌的痰液約500c.c.,主要功能則用來吸附呼吸道的病菌、代謝後的組織碎片及部分的微塵粒子,使得氣道的刺激減少,替呼吸道營造一個相對健康、乾淨的環境;再來可讓下呼吸的黏膜維持水潤舒適。

吳昭寬解釋,痰液由氣管咳出,若未完全吐出又吞回肚子,則會經由食道、再到胃部,不會再掉入氣管、回到肺部,因此不會有再度感染、或是痰液越積越大的疑慮。大多數人都可將痰咳出,唯有幼童,或是久臥病榻的患者、老人,因為咳痰力道不足,而容易出現痰液積肺的情況,必須經過拍痰、甚至抽痰機輔助。

至於咳出的痰該吐掉或吞往肚子呢?吳昭寬認為,兩種方法都可行,「吐出來當然會讓人覺得比較輕鬆自在,只是如果在公共場合似乎有礙觀瞻,直接往肚子裡吞也無妨。」畢竟胃酸的pH值接近2,吞下去的細菌和病毒大多都會被分解殺光,因此民眾不需太擔心把痰吞下去,而使病菌在體內繼續滋生。

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