大便黑色但检查又说没出血是怎么回事？

来自李文燕医生的专业解答，快打开看看是否又获得了新的知识点～

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快速问医生

病情分析：大便黑很有可能是存在上消化道出血，这个可通过查查大便是否存在潜血来明确，也有好多出现黑便是饮食、服用含铁药物、中药等导致，这后者就不用担心的。 

李文燕

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