《内经》曰:“地气上升为云,天气下降为雨”,水性润下,火性炎上,熬夜伤人阴分,包括津液,阴血等,阴不足,火相对过旺,水不制火,火性炎上,出现口燥咽干,口渴,声音嘶哑,眼干眼涩,精神疲乏,衰退,困倦而又心烦不眠等一系列阴虚火旺,水火不济之象,这个火是虚火,不能清火,只能降火,一般的治法会用滋阴降火的方法,方法没错,但效果不佳,因为补了阴,水性润下,不能上乘于上,这就需要增加肾和膀胱的气化功能才能使阴上乘于上,就像水烧开了才能蒸腾于上,水上去了才能制约心火,再加上降火的药,才能使水火既济,这就需要甄选滋阴降火,增强肾和膀胱气化功能的药
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