疽乃流注之败症也。如用凉药。则内伤其脾。外冰其血。脾主肌肉。脾气受伤。饮食必
肌肉不生。血为脉络。血既受冰。则血气不旺而愈滞。宜用理脾。脾健则肉自生。血气自运
行矣。又曰。白虎飞尸。留连周期。或展转数岁。冷毒朽骨出尽自愈。若附骨腐者可痊。正
骨腐则为终身废疾矣。有毒自手足或头面肿起。或兼疼痛。止至颈项骨节去处。如 疡贯珠
此风湿流气之症也。宜加减小续命汤、独活寄生汤主之。有两膝肿痛起。或至遍身骨疼痛者
。此风湿痹。又名 节风。宜附子八物汤。又有结核在项腋或两胯软肉处。名曰 痈。属
冷症也。又有小儿宿痰失道。致结核于项颈、臂膊、胸背之处。亦冷症也。俱用热药敷贴。
以上诸症。皆原于肾。肾主骨。肾虚则骨冷而为患也。所谓骨疽皆起于肾。亦以其根于
此也。故用大附子以补肾气。肾实则骨有生气。而疽不附骨矣。
若气血充实。经络通畅。决无患者。若气血素亏。或七情所伤。经络郁结。或腠理不
密。六淫外浸。隧道壅塞。
医者须当察其所由。辨其虚实。庶不误人。
发背、脑疽、脱疽、肿痛赤色。水衰火旺之色。尚可治。若黑或紫。火极以水之象也。
乃肾水已竭。精气已涸。决不治。
凡肿不高。色不赤。不 痛。脉无力。不饮食。肿不溃。腐不烂。脓水清。或多而不止
肉不生。属元气虚也。皆难治。宜峻补之。或脓血既泄。肿痛尤甚。脓水败臭。烦躁时嗽。
腹痛渴甚。泄利无度。小便如淋。乃恶症也。皆不治。
未成脓不灸。脓熟不开。腐不取。多致不救。
肿而一日至四五日未成脓而痛者。宜灸至不痛。灸而不痛或麻木者。明灸之。
肿硬不作脓。或痛或不痛。或微痛。或疮头如黍者。灸之尤效。亦有数日色尚微赤。肿
尚不起痛不甚。脓不作者。尤宜多灸。勿拘日期。更服甘温托里药。切忌寒凉之剂。
瘀肉不腐。桑柴火灸之。
脉数发热而痛者。发于阳也。可治。脉不数。不热不痛者。发于阴也。难治。不痛最
恶。不可视为常疾。此症不可不痛。不可大痛烦闷者不治。
疽是流注病发展而成的败坏重症。如果使用寒凉药物，就会内伤脾胃，外使血液凝滞。脾主肌肉，脾气受伤，饮食运化失常，肌肉便无法生长；血行于脉络之中，血液受寒凝滞，则气血运行不畅而更加瘀滞。应当使用调理脾胃的药物，脾胃健运则肌肉自然生长，气血自然运行通畅。
又说：白虎飞尸（一种严重的痹痛病症），病程迁延，或辗转数年，待冷毒之邪导致的朽骨排出后，疾病自愈。如果是附骨疽导致骨骼腐烂，尚可治愈；若是正骨（主要承重骨）腐烂，则会成为终身残疾。
有毒邪从手足或头面肿起，有时兼有疼痛，肿胀止于颈项及骨节部位，如疮疡贯穿珠串状，这是风湿流气之症。宜用加减小续命汤、独活寄生汤主治。若两膝肿痛，或遍及全身骨节疼痛，这是风湿痹证，又名历节风。宜用附子八物汤治疗。又有结核生于项部、腋下或两胯软肉处，名为石痈，属于冷症。又有小儿因宿痰失道，导致结核生于项颈、臂膊、胸背等处，也属于冷症。以上情况均应用热药敷贴。
上述诸症，根源都在肾。肾主骨，肾虚则骨冷而为患。所谓骨疽都起于肾，也是因其根源于此。因此使用大附子以补肾气，肾气充实则骨骼具有生机，疽毒便不会附着于骨。
如果气血充实，经络通畅，决不会患病。如果素来气血亏虚，或因七情内伤，导致经络郁结，或者腠理不密，六淫外邪侵袭，隧道壅塞不通。医者必须考察其病因，辨别虚实，才不会误人。
发背、脑疽、脱疽，若见肿痛且色赤，这是水衰火旺的表现，尚可治疗。若颜色黑或紫，这是火极似水的征象，说明肾水已竭，精气已枯，坚决不可治。
凡是肿胀不高，颜色不红，不疼痛，脉象无力，不能进食，肿胀不溃破，腐肉不烂，脓水清稀，或多而不止，新肉不生，属于元气虚弱，都难治疗，宜用峻补之法。或者脓血已泄，但肿痛反而更甚，脓水败坏臭秽，烦躁时常咳嗽，腹痛口渴严重，泄泻无度，小便如淋沥状，这是恶症，都不可治。
未成脓时不灸，脓熟时不切开，腐肉不剔除，多导致病情恶化无法挽救。
肿胀一日至四五日，尚未成脓而疼痛的，宜灸至疼痛停止。灸后仍不痛或麻木的，应明确施灸。
肿胀坚硬不作脓，或痛或不痛，或微痛，或疮头如黍米大小的，灸之尤为有效。也有数日后颜色尚微红，肿胀尚不起，疼痛不甚，脓不形成的，尤其适宜多灸，不要拘泥于日期，同时服用甘温托里药物，切忌使用寒凉药剂。
脉数、发热而疼痛的，发于阳分，可治。脉不数，不热不痛的，发于阴分，难治。不痛是最恶劣的症状，不可视为寻常疾病。此症不可以不痛，但若疼痛剧烈伴烦闷者，不可治。
Jú (ulcer) is a deteriorated and severe stage of the condition known as Liuzhu (flowing deposition). If cooling herbs are used, they will internally injure the Spleen and externally freeze the Blood. The Spleen governs the muscles; when Spleen Qi is injured, digestion and transformation are impaired, and muscles fail to grow. Blood flows within the collaterals; once the Blood is frozen by cold, Qi and Blood circulation becomes sluggish and stagnant. It is appropriate to use herbs that regulate the Spleen. When the Spleen is healthy, muscles will naturally regenerate, and Qi and Blood will circulate freely.
It is also said: "Baihu Feishi" (White Tiger Flying Corpse, a severe bi-syndrome characterized by migratory pain) lingers for cycles or may persist for several years. Self-healing occurs only after all necrotic bones caused by cold toxins are expelled. If the bone associated with Fugu Ju (bone-absorbing ulcer) rots, it can be cured; however, if the main weight-bearing bone rots, it results in lifelong disability.
If toxic pathogens cause swelling starting from the hands, feet, head, or face, sometimes accompanied by pain, and the swelling stops at the neck or joints—resembling sores piercing through beads—this is a syndrome of Wind-Dampness flowing with Qi. It should be treated primarily with Jiajian Xiao Ming Tang (Modified Decoction to Rescue Life) or Duhuo Jisheng Tang (Angelica Pubescens and Taxillus Decoction). If there is swelling and pain in both knees, or pain throughout the bones of the body, this is Wind-Dampness Bi-syndrome, also known as Lijie Feng (Joint Wind). It should be treated with Fuzi Bawu Tang (Aconite Eight-Ingredient Decoction). Additionally, nodules may appear in the neck, axillae, or soft flesh of the groin, named Shi Yong (Stone Abscess), which belongs to cold syndromes. In children, retained phlegm deviating from its pathway may cause nodules in the neck, arms, chest, or back, which also belong to cold syndromes. All such conditions should be treated with hot herbal compresses.
All the aforementioned syndromes originate from the Kidney. The Kidney governs the bones; Kidney deficiency leads to cold bones and pathology. Therefore, all bone abscesses arise from the Kidney because their root lies therein. Thus, Da Fuzi (large Aconite Root) is used to tonify Kidney Qi. When the Kidney is solid, the bones possess vital energy, and the abscess will not adhere to the bone.
If Qi and Blood are abundant and the meridians are unobstructed, disease will certainly not occur. However, if one is constitutionally deficient in Qi and Blood, or injured by the Seven Emotions causing stagnation in the meridians, or if the couli (pores/skin texture) are loose allowing invasion by the Six Evils (external pathogenic factors), leading to blockage of the tunnels, the physician must investigate the etiology and differentiate between deficiency and excess to avoid harming the patient.
For Fabei (back carbuncle), Nao Ju (brain ulcer), and Tuo Ju (gangrenous ulcer), if there is swelling, pain, and redness, this indicates Water deficiency and Fire hyperactivity, which is still treatable. If the color is black or purple, this is an image of extreme Fire resembling Water, indicating that Kidney Water is exhausted and Essence is depleted; this is definitely untreatable.
In cases where swelling is not high, color is not red, there is no pain, the pulse is weak, appetite is absent, swelling does not suppurate, necrotic tissue does not slough, pus is clear, or discharge is excessive without new tissue growth, this belongs to Yuanqi (Primary Qi) deficiency. These are difficult to treat and require vigorous tonification. Alternatively, if after pus and blood have been discharged, swelling and pain worsen, pus is foul-smelling and degenerated, accompanied by irritability, frequent coughing, abdominal pain, severe thirst, uncontrolled diarrhea, and dysuria-like symptoms, these are malignant signs and are untreatable.
Moxibustion should not be applied before suppuration; incision should not be performed when pus is mature; necrotic tissue should not be removed; failure to do so often leads to fatal outcomes.
If swelling appears and causes pain within one to four days before suppuration, moxibustion should be applied until the pain ceases. If there is still no pain or numbness after moxibustion, apply moxa clearly and sufficiently.
If swelling is hard without suppuration, whether painful, painless, or slightly painful, or if the sore head is like a millet seed, moxibustion is particularly effective. In cases where, after several days, the color remains slightly red, swelling is flat, pain is mild, and pus has not formed, extensive moxibustion is especially suitable, without being constrained by specific days. Concurrently, administer Ganwen Tuoli herbs (sweet-warm interior-supporting formulas). Strictly avoid cold-cooling agents.
For瘀肉 (stagnant/necrotic flesh) that does not slough, use Sangchai Huo (mulberry wood fire) for moxibustion.
If the pulse is rapid, accompanied by fever and pain, the disease originates in the Yang aspect and is treatable. If the pulse is not rapid, with no fever or pain, the disease originates in the Yin aspect and is difficult to treat. Painlessness is the most ominous sign and should not be regarded as a common ailment. This condition must present with pain; however, if pain is severe accompanied by vexation and distress, it is untreatable.