属太阳经，乃阴、阳二跷发源之所。由脏腑积热所致。忌毒药敷，外宜蒜灸，内服活命饮加
牛膝、肉桂，或紫金锭之类。阴虚服补阴诸丸，煎服。
妇人足跟、足趾肿痛，足心发热，肿处溃脓，皆宜八珍汤、六味丸；内热，逍遥散之类。
敷方 白术为细末，先以盐汤洗净，干掺上，一日一换，效。
治腿肚上疮，水出作痒，用贯众煎汤洗，后用百药煎末，唾调敷。
乃手足皴涩，皮肤裂开，疼痛不能见风。
膏方 沥青（四两） 白色黄蜡（八钱） 乳香（二钱，另研末）
上用铁器先熬麻油（一两），煎熟，次下沥青，即下黄蜡，以麻布滤入水中，扯拽黄色（揉入
乳末）。瓷器收贮。每用以药火上烘软涂之，外贴纸，其缝自合。
又方 手足裂痛，用清油（五钱），慢火煎沸，入黄蜡一块，再煎溶，入水粉、五倍末各少
许，熬紫色为度，以热水洗手足软，用药敷，以纸贴痛止。
又 脚缝湿烂，用枯矾三钱，黄丹五分为末，糁。
又 指缝搔痒成疮，血出不止，用多年粪桶箍烧灰敷之。
又 脚裂烂，以蒸熟藕研成膏，敷之。
又 脚裂缝，以五倍子为末，同牛骨髓填缝内即愈。
冬月脚跟裂，大开出血，用白芨（要明亮坚，勿枯燥者）研细末，水调如糊，先以裂热汤洗
净，抿药，外用纸盖，裹脚，过夜愈。冬月施人，大有利益。
通论以上诸毒∶
凡诸般肿毒初见， 赤肿痛，高硕速起，属阳证易治。恶寒发热表证，宜加减败毒散，发汗
消解。烦躁口渴，里证，宜黄连内疏汤攻下大便。无表里证，惟作大痛，邪在经络，先宜真人活
命饮解毒定痛，次托里养荣汤调和脏腑。若微赤肿痛，平塌不起，属阴经，难治。急宜十宣散、
托里散之类温补助阳。外治可灸、可围、可洗，惟不可针。或攻散，或穿溃、托里、排脓、生肌
、收口诸方诸法，悉于总论采用。其诸痈疽疮疡治法，亦大同小异。但宜各证加引经药，如患在上
，入升上之品；在下，兼降下之味。溃后温补气血，寒热虚实，随证参酌，可获十全之功矣。
Belongs to the Foot-Taiyang Bladder Channel, which is the source of the Yin and Yang Qiao Vessels. It is caused by accumulated heat in the Zang-Fu organs. Toxic drugs should be avoided for external application; externally, garlic moxibustion is suitable, internally Huoming Yin (Life-Saving Decoction) with Xuan Shen (Radix Scrophulariae), Niu Xi (Radix Achyranthis Bidentatae), Rou Gui (Cortex Cinnamomi) can be taken, or Zijing Ding (Purple Gold Pellet) and similar preparations. For those with Yin deficiency, Yin-nourishing pills are taken as decoctions.
For women with swelling and pain in the heels and toes, heat in the soles, and suppuration at the swollen sites, Bazhen Tang (Eight-Treasure Decoction) and Liuwei Wan (Six-Ingredient Pill with Rehmannia) are appropriate; if there is internal heat, Xiaoyao San (Free and Easy Wanderer Powder) and similar formulas may be used.
External Application Formula: Grind Baizhu (Rhizoma Atractylodis Macrocephalae) into fine powder. First wash the affected area with salt water, then sprinkle the powder on the dry skin, changing once a day. This is effective.
To treat sores on the calves that weep fluid and cause itching, wash with a decoction of Guanzhong (Cyrtomium Fortunii Rhizome), then apply a paste made from Baiyaojian (Galla Chinensis) powder mixed with saliva.
This refers to roughness and cracking of the skin on the hands and feet, causing pain and sensitivity to wind.
Ointment Formula: Qingxi (Asphaltum) (4 liang), Baise Huangla (White Beeswax) (8 qian), Ruxiang (Resina Olibani) (2 qian, separately ground into powder).
First boil Mahu You (Sesame Oil) (1 liang) in an iron vessel until cooked. Then add Qingxi, followed immediately by Huangla. Filter through hemp cloth into water, kneading until it turns yellow (incorporating the Ruxiang powder). Store in a porcelain container. When using, soften over a medicinal fire, apply, cover with paper, and the cracks will heal naturally.
Another Formula: For painful cracking of hands and feet, use Qingyou (Pure Sesame Oil) (5 qian). Boil slowly over low heat, add a piece of Huangla (Beeswax), continue boiling until melted. Add small amounts of Shui Fen (Lead Carbonate) and Wubei Fen (Galla Chinensis) powder. Boil until purple. Soften hands and feet in hot water, apply the medicine, cover with paper, and pain will cease.
Another: For damp rot between toes, use Kufan (Alumen Ustun) (3 qian) and Huangdan (Lithargyrum) (0.5 fen) ground into powder, sprinkled on the area.
Another: For itching and sores between fingers with unceasing bleeding, apply ash from the hoop of a bucket used for feces for many years.
Another: For cracked and rotting feet, apply a paste made from steamed lotus root.
Another: For foot cracks, grind Wubeizi (Galla Chinensis) into powder and mix with Niu Guisui (Marrow of Ox) to fill the cracks; this leads to healing.
In winter, for cracked heels that bleed heavily, use Baiji (Rhizoma Bletillae) (choose bright, firm pieces, not dry ones), grind into fine powder, mix with water to form a paste. Wash the cracked area with hot water first, apply the medicine, cover with paper, wrap the foot, and it will heal overnight. Applying this in winter is highly beneficial.
General Discussion on Various Toxins Above:
When any kind of swelling and toxin first appears, characterized by redness, swelling, pain, and rapid elevation, it belongs to Yang syndromes and is easy to treat. If accompanied by aversion to cold and fever (Exterior syndrome), Jiajian Baidu San (Modified Detoxifying Powder) should be used to induce sweating and resolve the pathogen. If accompanied by irritability and thirst (Interior syndrome), Huanglian Neishu Tang (Coptis Interior-Purging Decoction) should be used to purge the bowels. If there are no Exterior or Interior symptoms but only severe pain, indicating the pathogen is in the channels and collaterals, Zhenren Huoming Yin (True Man's Life-Saving Decoction) should be used first to detoxify and relieve pain, followed by Tuoli Yingrong Tang (Supporting the Interior and Nourishing the Nutritive Qi Decoction) to harmonize the Zang-Fu organs. If there is mild redness and swelling, flat and sunken, it belongs to Yin channels and is difficult to treat. Urgently use Shixuan San (Ten-Acupoints Powder) or Tuoli San (Supporting the Interior Powder) and similar formulas to warm and tonify Yang. External treatments may include moxibustion, encircling applications, and washing, but acupuncture needles must not be used. Methods such as dispersing, lancing, supporting the interior, draining pus, generating flesh, and closing wounds are all adopted from the General Discussion. The treatment methods for various carbuncles, ulcers, and sores are largely similar. However, channel-guiding herbs should be added according to the specific condition: for lesions in the upper body, add ascending herbs; for those in the lower body, add descending herbs. After ulceration, warm and tonify Qi and Blood, adjusting for Cold, Heat, Deficiency, and Excess based on the syndrome, to achieve complete recovery.