夫分經(jīng)用藥．當(dāng)知?dú)庋嗌伲鄤t易愈．少則難痊．瘡科之醫(yī)．明此大理．不致有犯禁頹敗壞逆之失也．如手少陽(yáng)三焦經(jīng)．手少陰心經(jīng)．手太陰肺經(jīng)．足少陽(yáng)膽經(jīng)．足少陰腎經(jīng)．足太陰脾經(jīng)．此六經(jīng)皆多氣少血．凡有瘡瘍．最難收口．如手厥陰心胞絡(luò)經(jīng)．手太陽(yáng)小腸經(jīng)．足太陽(yáng)膀胱經(jīng)．足厥陰肝經(jīng)．此四經(jīng)皆多血少氣．凡有瘡瘍．宜托里．手陽(yáng)明大腸經(jīng)．足陽(yáng)明胃經(jīng)．此二經(jīng)氣血俱多．初宜內(nèi)消．終則收功易得．故表此．不可一概而論治哉．