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為什麼一緊張就容易拉肚子?腸胃科醫師解析

不少人都有這樣的經驗:重要考試、上台報告、面試之前,突然感到肚子咕嚕作響,甚至忍不住跑廁所。這種「一緊張就拉肚子」的現象,其實在醫學上並不少見。到底是什麼原因,讓心理壓力影響到腸胃?以下由腸胃科醫師為你解析。

1. 腸腦軸線:大腦與腸道的雙向對話

人體的腸道不只是單純的消化器官,它還被稱為「第二大腦」。腸道內分布了超過一億個神經元,能和大腦進行雙向溝通,這就是所謂的 腸腦軸線(Gut-Brain Axis)

當人感到緊張、焦慮時,大腦會釋放壓力激素(如腎上腺素、皮質醇),透過神經與荷爾蒙影響腸道:

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