此疽疮者，非痈疽也，是 之类，世谓之 疽。多发于指节脚胫间，相对生，
作细 瘰子，币币而细孔，疮里有虫痒痛，搔之有黄汁出，随瘥随发也。
寒热邪气，客于经络，使血气痞涩。初生作细瘰 ，或如梅李核大，或如 干，
或圆或长，长者至五六分，不过一寸。或一或两三相连，时发寒热，仍脓血不止，谓之漏也
。皆是五脏六腑之气不和，致血气不足，而受寒热邪气。然 者，有鼠 、蝼蛄 、蚯蚓
、蛴螬等 ，以其于当病名处说之也。
者，风湿搏于血气所成。多着手足节腕间，币币然，搔之痒痛，浸淫生长，呼谓
之。以其疮有细虫，如 虫故也。
疥疮，多生手足指间，染渐生至于身体，痒有脓汁。按《九虫论》云∶蛲虫多所变化，
亦变作疥。其疮里有细虫，甚难见。小儿多因乳养之人病疥，而染着小儿也。
癣病，由风邪与血气相搏于皮肤之间不散，变生隐轸。轸上如粟粒大，作匡郭，或邪或
圆，浸淫长大，痒痛，搔之有汁，名之为癣。
小儿面上癣，皮如甲错起，干燥，谓之乳癣。言儿饮乳，乳汁渍污儿面，变生此。仍以
乳汁洗之便瘥。
小儿有血气不和，肌肉变生赤色，染渐长大无定，或如钱大，或阔三数寸是也。
脐疮，由初生断脐，洗浴不即拭燥，湿气在脐中，因解脱遇风，风湿相搏，故脐疮久不
瘥也。脐疮不瘥，风气入伤经脉，则变为痫也。
这种疽疮，并非通常所说的痈疽，而是属于疳疮一类的疾病，世俗称之为疳疽。它多发于手指、脚趾和小腿胫骨之间，往往左右对称生长，形成细小的瘰疬样结节，表面布满细密的小孔，疮内有虫体导致瘙痒疼痛，搔抓后有黄色汁液流出，病情时好时坏，反复发作。
寒邪与热邪侵入经络，导致气血运行阻滞不畅。初起时形成细小的瘰疬，大小或像梅子李子核，或像干果，形状有的圆有的长，长的可达五六分，不超过一寸。有时单个出现，有时两三个相连，时常伴有发冷发热，且脓血淋漓不止，这被称为“漏”。这些都是由于五脏六腑之气不和，导致气血不足，从而受到寒热邪气的侵袭所致。至于所谓的“疳”，是因为有鼠瘘、蝼蛄疖、蚯蚓疮、蛴螬疮等名称，这些内容在论述病名的章节中已有说明。
所谓“癣”，是由风湿之邪与气血搏结而形成的。多发生于手足关节腕部之间，密集分布，搔抓后感到痒痛，病变逐渐浸润扩大，因此称为癣。因为疮中有细小的虫子，如同蚰蜒（一种节肢动物）一样，所以得名。
疥疮，多生于手指脚趾之间，逐渐蔓延至全身，伴有瘙痒和脓汁。根据《九虫论》记载：蛲虫具有多种变化，也能转化为疥疮。其疮内含有细小的虫体，很难被发现。小儿患此病，多是因为哺乳者患有疥疮，从而传染给小儿。
癣病，是由于风邪与气血在皮肤之间相互搏结而不能消散，变生出隐疹。隐疹上如粟粒般大小，形成边缘，形状或不规则或圆形，逐渐浸润扩大，伴有痒痛，搔抓后有汁液流出，命名为癣。
小儿面部的癣，皮肤粗糙如鳞甲交错，干燥，称为乳癣。这是因为婴儿吃奶时，乳汁渍污了面部，从而变生此病。仍用乳汁清洗患处即可痊愈。
小儿若气血不和，肌肉变生红色斑块，逐渐扩大且无固定形态，有的如铜钱大小，有的宽达数寸。
脐疮，是由于出生时断脐后，洗浴后未及时擦干，湿气滞留于脐中，加之脐带脱落时遭遇风邪，风湿相搏，导致脐疮久不愈合。如果脐疮长期不愈，风气侵入损伤经脉，就会转变为痫证。
This type of *ju* sore (ulcerative lesion) is not the typical *yong ju* (carbuncle and furuncle), but belongs to the category of *gan* sores (gangrenous or parasitic ulcers), commonly known in the world as *gan ju*. It frequently occurs between the fingers, toes, and the shins, often appearing symmetrically. It presents as small, scrofula-like nodules with numerous tiny pores on the surface. There are insects within the sore causing itching and pain; scratching yields yellow exudate. The condition heals temporarily but recurs repeatedly.
Cold and heat pathogenic factors invade the meridians, causing stagnation and obstruction of Qi and Blood. Initially, small scrofula-like nodules form, varying in size from that of a plum or apricot pit to a dried fruit. They may be round or elongated, with elongated ones reaching five or six *fen* (approx. 1.6-2 cm), but not exceeding one *cun* (approx. 3.3 cm). They may appear singly or in clusters of two or three. Accompanied by alternating chills and fever, and persistent discharge of pus and blood, this condition is termed "Lou" (fistula/sinus tract). These conditions arise from disharmony among the Zang-Fu organs, leading to deficiency of Qi and Blood, which makes the body susceptible to cold and heat pathogens. Regarding the term "Gan," it refers to conditions such as Shu Lou (scrofula), Lou Gu Ju (mole cricket ulcer), Qiu Yin Chuang (earthworm sore), and Si Cao Chuang (white grub sore); these are discussed in detail in the sections concerning disease names.
The condition referred to as "Xuan" (tinea/ringworm) is formed by the struggle between Wind-Dampness and Qi and Blood. It mostly occurs around the joints and wrists of the hands and feet, presenting densely. Scratching causes itching and pain, and the lesions spread gradually through infiltration. It is called Xuan because there are fine insects in the sores, resembling centipedes (You Yan).
Jie Chuang (Scabies) mostly arises between the fingers and toes, spreading gradually to the rest of the body, accompanied by itching and purulent discharge. According to the *Jiu Chong Lun* (Treatise on Nine Parasites), *Nao Chong* (pinworms/Ascaris) can undergo various transformations and also manifest as Scabies. The sores contain fine parasites that are difficult to see. Infants often contract this disease from caregivers who have scabies.
Xuan Bing (Tinea disease) results from Wind Pathogen struggling with Qi and Blood in the skin, failing to dissipate, thereby generating hidden rashes (Yin Zhen). On these rashes, lesions appear grain-sized like millet seeds, forming distinct borders (Kuang Guo), either irregular or round. They spread via infiltration, causing itching and pain, with exudate upon scratching, and are named Xuan.
Xian Er Mian Shang Xuan (Infant Facial Tinea): The skin becomes rough like scales, dry, and is called Ru Xuan (Milk Tinea). This occurs because milk residue stains the infant's face during feeding, leading to its formation. Washing the area with breast milk leads to recovery.
In infants, if Qi and Blood are disharmonious, red patches may develop on the muscles. These patches spread gradually without a fixed shape, sometimes the size of a coin, or several inches wide.
Qi Chuang (Umbilical Sore): This arises because after cutting the umbilical cord at birth, the area was not dried immediately after bathing, allowing dampness to remain in the navel. When the cord detached, exposure to Wind occurred. The combination of Wind and Dampness caused the umbilical sore to fail to heal for a long time. If the umbilical sore does not heal, Wind Pathogen enters and damages the meridians, potentially transforming into Epilepsy (Xian Zheng).