睢阳张士美病伤寒七八日．口燥饮水而不咽入．俄而衄血．脉浮紧．身热．医者云伤寒．脉浮紧．不发汗．因致衄血者．属麻黄汤．予曰．不可．古人虽www.lindalemus.com/job/云当汗不汗．热化为血．此证亦有不可汗者．仲景云阳明病．口燥www.lindalemus.com/Article/．但欲饮水而不咽者．必发衄．衄家不可发汗．发汗则额上陷．不得眠．不能 ．此只可用犀角汤．地黄汤．若当时行麻黄．必额上陷．直视不眠也．