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為什麼一緊張就容易拉肚子？腸胃科醫師解析

2025.09.19 14:28

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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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