Résumé
On the basis of defining the philosophical topic essence of“inside diseases show signs outside”and affirming its TCM application value, from the philosophical and clinical angles, it ful y analyses its limitations, i.e. unification is just one aspect of co-relation between inside and outside, appearance and essence, both opposition and integration are al and the essence of their relation, this is why the condition“inside diseases show signs outside”exists in clin-ic;on the other side, the integration of inside and outside, appearance and essence has complex to some extent, the TCM with prerequisite of “inside dis-eases show signs outside”and the method of “knowing inside with outer signs”have their own shortcomings and advantages, doctors shal foster the strengths and circumvent the weakness.