夫大便下血者,多因过饱饮酒,无度房室,劳损荣卫,气虚风冷易入,邪热易蕴,留注大肠则为下血。血色鲜者风也;色如小豆汁者寒也;浊而色黯者热也。久而不愈,必为痔漏之疾矣。脉来浮弱,按之带芤者下血也,治之之法,风则散之,热则清之,寒则温之,虚则补之,所增