痈发于六腑。为表为阳。为热为实。其发迅暴。如燎原之火。故热痛高肿。侵长广大。皮薄光软以泽。多有
椒眼。或作便闭。发渴发逆以拒之。由正气内固。不能下陷。是以五脏终不伤也。
疽之发于五脏。为里为阴。为冷为虚。其发停蓄。如陶室之火。内消骨髓。故无热、无肿、无痛。形如 。色
淡而坚。甚则如牛领之皮。见七恶逆症者死。（七恶逆症歌见后）阳中之阴者。似热非热。虽肿而虚。赤而不燥。痛而
不脓。浮而复消。外盛而内腐。其人多肥。肉紧而内虚也。阴中之阳者。似冷非冷。不肿而实。赤微而燥。痛
而有脓。外不盛而内烦闷。其人多瘦。肉缓而内实也。
阳症变而为阴者。草医凉剂之过也。阴症变而为阳者。大方热药之骤也。然阳变为阴。为犹可返于阳
也。其症多生。阴变为阳。为不久复归于阴矣。其症多死。阳症有热。则气血行而生肌。阴症无热。则气血
滞而不敛。故云。有热无热为生死之诀。观此。则知痈疽有阴阳表里虚实之分。而无大小之别也。第恐
犹有未悉者。再续阴阳、善恶、生死、顺逆、等歌。内消、内托、虚实等治。使一见了然。庶无舛误。
痈疽不论上中下。惟在阴阳二症推。发背虽有正与偏。要取高低两样看。纯阳初起必 肿。更兼身热
有微寒。顶如尖字高突起。肿似弯弓根有盘。七日之间多 痛。二七之期脓渐漫。动息自宁食知味。二
便调匀无泻干。肿消脓溃精神爽。脱腐生新气血完。五善自然臻并至。七恶全无半点干。痛便随脓减。
肿退自肌宽。新肉已生红艳艳。腐皮自敛白漫漫。一身多爽快。五脏尽和欢。此属纯阳俱易治。百人百
可保全安。
Carbuncles (Yong) occur in the six fu organs. They are exterior and yang, characterized by heat and excess. Their onset is rapid and violent, like a fire spreading across a prairie. Therefore, they present with hot pain and high swelling, invading and expanding widely. The skin is thin, smooth, soft, and lustrous, often having pustules resembling pepper eyes, or accompanied by constipation. Symptoms such as thirst and hiccups arise as the body resists the pathogen. This is because the healthy qi is solidified internally, preventing the pathogen from sinking inward. Thus, the five zang organs are ultimately not injured.
Jie (deep abscesses) occur in the five zang organs. They are interior and yin, characterized by cold and deficiency. Their onset is stagnant and slow, like fire in a pottery kiln, consuming the bone marrow from within. Therefore, there is no heat, no swelling, and no pain. The shape resembles a depression, the color is pale yet firm, and in severe cases, it resembles the skin of an ox's neck. Death occurs if the seven evils (qi e, severe adverse syndromes) appear. (The song for the seven evils is found later.)
Yang containing Yin appears to have heat but does not truly have heat; although swollen, it is deficient; red but not dry; painful but without suppuration; fluctuating and then subsiding; appearing vigorous externally but rotting internally. Patients with this condition are often obese, with tight flesh but internal deficiency.
Yin containing Yang appears to be cold but is not truly cold; not swollen but substantial; slightly red and dry; painful with suppuration; not vigorous externally but internally restless. Patients with this condition are often emaciated, with loose flesh but internal excess.
When a Yang syndrome transforms into a Yin syndrome, it is due to the excessive use of cooling formulas by unskilled practitioners. When a Yin syndrome transforms into a Yang syndrome, it is due to the sudden effect of large doses of warming medicines. However, when Yang transforms into Yin, it can still revert to Yang, and such cases mostly survive. When Yin transforms into Yang, it soon returns to Yin, and such cases mostly die. Yang syndromes have heat, allowing qi and blood to circulate and generate tissue; Yin syndromes lack heat, causing qi and blood to stagnate and fail to heal. Thus, it is said that the presence or absence of heat is the key to life and death. Observing this, one knows that carbuncles and deep abscesses are distinguished by yin/yang, exterior/interior, and excess/deficiency, but not by size. Fearing that some details may still be unclear, I continue with songs on yin/yang, good/bad omens, life/death, and favorable/unfavorable courses, along with treatments for internal resolution, internal support, and excess/deficiency, so that everything becomes clear at a glance, thereby avoiding errors.
Carbuncles and deep abscesses, whether located in the upper, middle, or lower parts of the body, must be deduced through the two syndromes of yin and yang. Back carbuncles (Fa Bei), though occurring in central or lateral positions, must be observed from both high and low perspectives. Pure Yang syndromes initially present with definite swelling, accompanied by fever and slight aversion to cold. The apex rises sharply like the character "Jian" (pointed), and the swelling arches like a bow with a spreading base. Within seven days, there is often intense pain; by fourteen days, pus gradually spreads. At this stage, breathing is calm, appetite is normal, and bowel movements are regular without diarrhea or constipation. As swelling subsides and pus drains, spirit refreshes, necrotic tissue sheds, new tissue grows, and qi and blood are restored. The five goods (wu shan, five auspicious signs) naturally converge, while the seven evils are completely absent. Pain decreases with pus discharge, and swelling recedes with muscle relaxation. New flesh appears bright red, and necrotic skin heals over white. The whole body feels comfortable, and the five zang organs are harmonious. These pure Yang cases are all easy to treat, and virtually all patients can be saved.