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Shen Douyuan stated: Blood groove wind (Xuecao Feng) arising in the solid parts of the lower legs is treatable; its toxic qi often flows to the dorsum of the foot, resembling back carbuncle of the foot (Jiao Fabei). (*Qixuan*)

Chen Shigong stated: Dampness swelling (Shizhong) presents with a sensation of fullness and tightness in the chest and diaphragm, difficult urination, and edema of the eyes, which gradually spreads to the whole body. This is due to the injury of Spleen Earth failing to govern transformation and transportation. It can be caused by sudden exposure to wind-cold after eating, or mistakenly consuming raw and cold foods when hungry or thirsty, leading to accumulation of cold in the middle jiao and failure of food digestion. Treatment should focus on unblocking the Spleen Earth and warming and nourishing the Spleen-Yuan Qi, so that urination will naturally become smooth and edema will subside. Erjiao San is the primary formula. (*Zhengzong*)

Application for Edematous Swelling:
Dry Yellow Earth (4 liang), Borax (1 liang), Raw Rhubarb (2 liang).
Grind into fine powder. Mix with juice of green onion for external application.

Wang Kentang stated: Kidney wind (Shenzang Feng) belongs to the Kidney pathology. Deficient wind-pathogens attack the shins, causing the skin to resemble tinea, or gradually spreading up the thighs, and eventually covering the whole body if prolonged. External manifestations include itching leading to sores with dripping pus and fluid; internal manifestations include dry mouth and tongue, fatigue of the waist and legs, expectoration with fever, night sweats, and general debility. Treatment should utilize Liuwei Dihuang Wan. (*Zhunsheng*)
*Xinfa* states: Kidney qi wandering wind (Shenqi Youfeng) mostly occurs in individuals with Kidney deficiency. The calf muscles become red and swollen, shaped like cloud patches, moving unpredictably, with pain feeling like burning. This results from internal accumulation of Kidney heat, external invasion of wind pathogens, and stagnation of Bladder Qi.

For Kidney qi wandering wind with redness, swelling, and burning pain: Grind tofu into a paste, apply with powder of Phellodendri Cortex (Huangbai).
Yellow Wax Ointment (Huanglagao):
Dragon Bone (Longgu) [weight missing], Red Halloysite (Chishizhi) [weight missing], Dragon's Blood (Xuexie) (3 qian each).
Grind all into fine powder. Use 1 liang of sesame oil, add a ball of hair (Cilia) the size of a chestnut, fry until withered, then remove dregs. Add 1 liang of yellow wax and 3 qian of White Rosin (Baijiaoxiang), melt off the fire, then stir in the three powdered ingredients evenly. Store in a porcelain jar after cooling. When using, pinch into thin slices and apply to the sore, bind firmly with silk cloth, and replace every three days.

Wang Kentang stated: Damp-toxin flowing collection (Shidu Liuzhu) arises between the feet and shins. The sores resemble ox eyes, appearing purple or black, with dripping pus and fluid. Where the flow stops, ulceration occurs; if prolonged, it does not heal. This is formed by invasion of strong winds, heavy rains, cold-dampness, and summer-heat into the interstices. (*Zhunsheng*)
He also stated: Lower-flowing sores (Xiazhu Chuang), also known as damp-toxin sores (Shiduchuang), arise between the feet and knees, with continuous pus discharge and non-healing over years. This is due to deficiency of Spleen and Stomach, with damp-heat flowing downward, causing muscle insensibility and formation of sores. Externally, it relates to the Foot-Taiyang and Foot-Shaoyang meridians; internally, to the Foot-Jueyin and Foot-Taiyin meridians. (Application of Ligustrum lucidum leaves is effective.)
Hu Gongbi stated: Skin resembling pinpricks, oozing foul-smelling water, with spreading on legs and feet is this condition. Tuozhi Gao is the primary formula. (*Qingnang*)
Shen Douyuan stated: Rotting of both legs with unbearable odor is this condition. It is caused by damp-heat and should be treated by clearing damp-heat. (*Qixuan*)
Generally, sores generated by damp-toxin appear on the calves, ankles, dorsum of the feet, and heels. Initially, there is slight itching, oozing fluid, and chronic non-healing. Internal treatment primarily uses Buzhong Yiqi Tang combined with Ermiao San; external application primarily uses Zhibai San. (*Lianggui*)
*Xinfa* states: This syndrome arises in the shins, spreading unpredictably, sometimes appearing in one or two places. The sore opening resembles an ox eye, with diffuse swelling at the base. Mild cases are purple; severe cases are black. After ulceration, pus infiltrates and damages healthy flesh, resulting in long-standing non-healing wounds. This is caused by invasion of strong winds, heavy rains, cold-dampness, and summer-heat/fire into the skin and muscles. Upon initial sensation, urgently administer Jingfang Tongsheng San added with Fructus Chaenomelis (Mugua), Achyranthis Bidentatae Radix (Niuxi), Akebiae Caulis (Fangji), and Atractylodis Macrocephalae Rhizoma (Cangzhu) to eliminate the pathogen. If the shins feel hot in the evening, take Danggui Niantong Tang added with Niuxi until swelling and pain completely subside, then apply Qingfen San externally to promote healing. (*Jinjian*)