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The *Bingyuan Lun* (Treatise on the Origins and Manifestations of Diseases) states: "Shijiao" (Corpse Foot), refers to the cracking and splitting of the heel skin. This is also caused by exposure to cold pathogenic factors during winter. It is further stated that this condition arises from stepping on ground where a corpse has lain.

The *Ge Shi Fang* (Prescriptions by Ge) treats feet that crack persistently regardless of season, named Shijiao. Method caused by treading on a corpse's resting place:
Take one sheng of chicken manure and two sheng of water, boil several times, soak and wash the affected area for half a day before removing. Repeat multiple times until recovery. (Identical to the *Qianjin Fang*).

The *Xinlu Fang* (Newly Recorded Prescriptions) treats Shijiao:
Soak in decoction prepared from hemp seeds (Cannabis Fructus).

Another prescription: Crush fresh Portulaca oleracea (Ma Xian, Purslane) to extract juice for washing or boiling to soak the affected area.

Another prescription: Soak in decoction of turnip roots (Brassica rapa var. rapifera Radix).

Another prescription: Apply vehicle grease (fat from cartwheel axles).

The *Bingyuan Lun* states: "Rouci" (Flesh Thorn), refers to flesh growths resembling thorns appearing between toes, termed Rouci. This arises from wearing tight or small boots, causing friction between toes.

The *Xinlu Fang* treats Rouci:
Frequently apply clarified butter (Su).

Another prescription: Scrape gently with refined sugar paste.

Another prescription: Soak in warm saline solution.

Another prescription: Massage with vinegar until it subsides.

Another prescription: Apply grain ferment liquid and scrape off.

Another prescription: Heat gold or silver hairpins and cauterize the lesion.

Another prescription: Mix Frankincense (Ruxiang, Boswellia Resina) and Sulfur in equal parts, grind together. Apply appropriate amount to the thorn and cauterize.

The *Jiuji Danyan Fang* (Emergency Single-Effect Prescriptions) treats foot sole Rouci:
Trim the head of the thorn to induce bleeding. Attach a rice-grain-sized piece of Cinnabar (Dan, Realgar/Chen Sha) to the wound, bandage it, and it will heal.

Another prescription: Cut away the thorn with a knife, then grind writing ink and apply repeatedly. Dozens of applications yield permanent cure and verified efficacy.

The *Bingyuan Lun* states: Frozen sores and swelling ulcers occur in severe winter months when exposed to wind, snow, and cold toxic qi, damaging the skin and muscle, leading to stagnation and涩ness of blood and qi, resulting in Zhudong (frostbite).

The *Ge Shi Fang* treats swollen, ulcerated sores on hands and feet caused by cold and snow:
Apply vehicle grease (cart axle fat), warmed until hot, and pour over the affected area. Beeswax mixed with honey is also good.

Another prescription: Soak in warm brine from pickled vegetables.

Another prescription: Soak in hot urine.

Another prescription: Burn millet, foxtail millet, or wheat straw to ash. Mix with water and boil. While hot, pour through a perforated vessel into a tube, dripping onto the sore for half a day.

The *Qianjin Fang* states: If walking in ice and snow during winter causes damage to the face, hands, and feet, or if there is initial heat, pain, and impending frostbite:
Take wheat leaves, boil into a concentrated decoction, and wash the affected area while hot.

It also states: Method for treating frozen fingers about to fall off: Three sheng of horse manure and three sheng of water, boiled until bubbling, soak for half a day, and it heals. (Identical to the *Jingxin Fang*).

The *Xinlu Fang*: Roast yeast, powder it, and sprinkle on the affected area.

Another prescription: Wash with decoction of pine needles.

The *Jiyan Fang* treats frostbite:
Pour melted beeswax from the twelfth lunar month onto the affected area.