背为阳部，又督脉循行之道，人身气为阳，而血为阴。若阳衰而阴偏盛，脉络因之
不畅，每入饮食，所化精微，不归正化，而变为痰，留滞经络，走注于背，致漫肿隐痛，
最难消散。体壮者，溃脓虽迟，犹可收功。体弱者，十中难保二三。
大肠尽处为肛门，肺与大肠相表里，气主于肺。盖劳碌忍饥，或负重远行，及病后
辛苦太早，皆伤元气。气伤则湿聚，湿聚则生热，热性上炎，湿邪下注，渗入大肠而成
漏，时流脓水。由咳嗽延为漏者难治。体实者与其刀割挂线，不若内服消漏丸（方见后），久
久自效。
两胫内外廉骨，每有脾虚，湿盛化热，蕴于血分，而成 疮。初发红片，破流臭水，极
其延绵难效。或有气虚下陷，而患口难敛者。但壮实妇女患此，而疮口常血出不止者，由
天癸将临，经血错行，不循正轨，尤不易效，宜内投凉血清热之剂。春夏时，阳气升泄，治
多费手。交秋冬后，人身肌肤固密，始易为力。外掺用黄灵丹、胜湿丹。方载《青囊集》。
肾主骨，肺主气，先天属肾，肾虚必盗肺气，肺损不能下荫，子母交戕，故病后失
调。或咳久伤气，使胸前忽生高骨，渐凸成患者。男妇容或有之，惟小儿禀质不足，得
此者居多。初起外在骨尖处灸之（切忌针刺，）内服补肺养阴汤方见后。
背部属于阳的部位，也是督脉循行的通道，人体中气属阳，血属阴。如果阳气衰弱而阴气偏盛，脉络因此不畅，每当进食后，饮食所化生的精微物质，不能正常转化，反而变成痰湿，停滞在经络中，流注到背部，导致弥漫性肿胀和隐隐作痛，最难消散。体质强壮的人，虽然溃破排脓的时间较晚，但仍有希望治愈。体质虚弱的人，十个人中很难保住两三个。
大肠的尽头是肛门，肺与大肠互为表里，气主要由肺主管。大概是因为劳累忍饥，或者负重远行，以及病后过早过度劳作，都会损伤元气。气受损则湿气聚集，湿气聚集则产生热邪，热性向上炎上，湿邪向下流注，渗入大肠形成瘘管，时常流出脓水。由咳嗽发展而来的瘘管难以治疗。体质结实的人，与其采用刀割或挂线疗法，不如内服消漏丸（方剂见后），久而久之自然见效。
小腿内外侧的骨头处，常因脾虚、湿气盛而化热，蕴结在血分中，形成疮疡。初期发红片，破溃后流出臭水，极其缠绵难愈。有的因为气虚下陷，导致疮口难以收敛。如果是壮实的妇女患此病，且疮口经常出血不止，这是由于天癸（月经）即将来潮，经血错乱运行，不循正常轨道，尤其不容易见效，适宜内服凉血清热的药剂。春夏时节，阳气升发宣泄，治疗较为费力。到了秋冬之后，人体肌肤腠理固密，才开始容易施治。外用掺敷黄灵丹、胜湿丹。方剂记载于《青囊集》。
肾主骨，肺主气，先天之本属于肾，肾虚必然盗取肺气，肺受损不能向下滋养，子母相互伤害，所以病后调理不当。或者久咳损伤气机，使得胸前突然生出高骨，逐渐凸起成为鸡胸症。男女或许都有这种情况，只有小儿禀赋不足，得此病的居多。初起时在外部骨尖处进行艾灸（切忌针刺），内服补肺养阴汤（方剂见后）。
The back is a Yang region and also the pathway of the Du Meridian (Governor Vessel). In the human body, Qi is Yang, while Blood is Yin. If Yang Qi declines and Yin becomes predominant, the meridians and collaterals become obstructed. Consequently, after every meal, the refined essence derived from food fails to undergo normal transformation and instead turns into Phlegm-Dampness. This lingers in the meridians and collaterals, flows into the back, causing diffuse swelling and dull pain, which is extremely difficult to dissipate. For those with strong constitutions, although suppuration may be delayed, recovery is still possible. For those with weak constitutions, only two or three out of ten may survive.
The end of the Large Intestine is the anus; the Lung and Large Intestine are exterior-interiorly related, and Qi is primarily governed by the Lung. Generally, overwork combined with fasting, carrying heavy loads over long distances, or excessive exertion too soon after illness all damage Yuan Qi (Primordial Qi). When Qi is damaged, Dampness gathers; when Dampness gathers, Heat arises. The nature of Heat is to flare upward, while Dampness tends to sink downward. Penetrating into the Large Intestine, this forms a fistula (a chronic tunnel-like tract), which periodically discharges pus and fluid. Fistulas resulting from prolonged coughing are difficult to treat. For those with solid constitutions, rather than undergoing knife surgery or seton therapy, it is preferable to internally administer Xiaolou Wan (Eliminate Fistula Pill) (see formula below), which will gradually take effect over time.
On the medial and lateral aspects of the tibia, due to Spleen deficiency and excessive Dampness transforming into Heat, pathogenic factors accumulate in the Blood level, forming sores (ulcers). Initially, red patches appear; upon rupture, foul-smelling fluid drains out, making the condition extremely persistent and hard to cure. Some cases involve Qi deficiency with sinking, leading to difficulty in wound closure. If robust women suffer from this, with continuous bleeding from the sore, it is often because Tian Gui (Menstrual Menses) is approaching, causing menstrual blood to flow irregularly and deviate from its normal course. Such cases are particularly resistant to treatment and require internal administration of Blood-cooling and Heat-clearing formulas. During Spring and Summer, when Yang Qi ascends and disperses, treatment requires considerable effort. After entering Autumn and Winter, when the body's skin and pores become tight and secure, treatment becomes easier. Externally, apply Huangling Dan (Yellow Spirit Elixir) and Shengshi Dan (Dampness-Overcoming Elixir). These formulas are recorded in *Qingnang Ji*.
The Kidney governs the bones, and the Lung governs Qi. The congenital foundation belongs to the Kidney. Kidney deficiency inevitably steals Lung Qi. If the Lung is damaged and cannot nourish downwards, the mother and child organs harm each other. Thus, improper regulation after illness, or prolonged coughing damaging Qi, can cause a high bone to suddenly appear on the chest, gradually protruding into Pigeon Chest (Pectus Excavatum/Carinatum). This may occur in both men and women, but it is most common in children with insufficient congenital constitution. At the onset, moxibustion should be applied to the external bony prominence (acupuncture needles must strictly be avoided). Internally, administer Bufe Yangyin Tang (Tonify Lung and Nourish Yin Decoction) (see formula below).