仲景曰.微数之脉.慎不可灸.因火为邪.则为烦逆.追虚逐实.血散脉中.火气虽微.内攻有力.焦骨伤筋.血难复也.常氏云.宜桂枝去芍药加蜀漆牡蛎龙骨救逆汤.欲其有汗.宜柴胡桂枝汤.
又曰.脉浮.当以汗解.而反灸之.邪无从出.因火而盛.病从腰以下必重而 .名为火逆.若欲自解.当先烦.乃有汗.随汗而解.何以知之.脉浮.故知汗出当解.
又曰.火逆下之.因烧针烦躁者.桂枝甘草龙骨牡蛎汤主之.
又曰.脉浮热甚而灸之.此为实.实以虚治.因火而动.必咽燥吐血.
又曰.伤寒脉浮.医以火迫劫之.亡阳惊狂.卧起不安者.桂枝去芍药加蜀漆牡蛎龙骨救逆汤.
庞氏曰.灸及烧针之后证以火劫者.并宜火劫法治之.烦躁惊及狂.用六石风引汤尤良.柴胡加龙骨牡蛎汤亦通用.
又曰.不当灸而误灸.令火邪入腹.干错五脏.重加烦死.雍曰.凡火邪逆证者.宜桂枝甘草龙骨牡蛎汤.