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He Yang Ju (Abscess at He Yang)
This occurs in the Foot-Taiyang Bladder Meridian, caused by toxic damp-heat. Initially, herbs that support the interior, dispel dampness, and clear heat should be used. Internally administering Qianghuo Tang (Notopterygium Decoction) to induce sweating will lead to recovery. If the lesion has already formed, adding herbs that drain pus and relieve pain will cause it to ulcerate. External application of plasters will cure it.

Tuo Ju (Falling Off Gangrene)
It occurs on the big toe or the second toe of the foot, or involves ulceration and detachment of the foot, hence named Tuo Ju (Falling Off Gangrene). It results from accumulated toxins in the Spleen Meridian sinking downward. The area is red; whether painful and swollen or not, it should be treated with moxibustion using garlic. It is treated with formulas such as Renshen Baidu San (Ginseng Detoxification Powder) to support the interior and detoxify. If the color turns purple-black, urgent amputation is required. If the blackness extends above the ankle bone, it is incurable.

Ding Chuang (Carbuncle/Boil)
Any Ding Chuang (Carbuncle) on the fingers is called Zhu Jie Ding (Borer-Joint Carbuncle); severe cases require amputation of the affected segment, while mild cases result in hand contracture.
Any Ding Chuang initially arises without a fixed location, caused by sluggish obstruction of Ying (Nutrient) and Wei (Defensive) Qi. As the classics state: "Changes from rich food and drink can produce large Ding Chuang." Dong Yuan classified Ding Chuang into twenty-three types; I now classify them into thirty-four types, all discussed in previous sections. At the initial stage, there is general stiffness and spasms, with locked jaws resembling Jing Syndrome (Spasm Syndrome). Pricking the top of the carbuncle to bleed is appropriate. Chan Su Ding (Toad Venom Pill) should be taken internally. If the pupils turn black, death is inevitable.

Gu Xian Chuang (Bone Exostosis Ulcer)
This occurs in the Foot-Taiyang Bladder Meridian, which is characterized by abundant blood but deficient Qi. It arises at the Shentang (BL-44) acupoints and the Ge Guan (BL-48) and Ge Shu (BL-17) acupoints. Initially, it causes unbearable itching, resembling blistering water blisters; scratching breaks the skin, revealing the bone underneath. If, after ten days, the whole body becomes itchy, it is incurable.

Gu Wei Chuang (Bone Withering Ulcer)
This occurs in the Foot-Shaoyang Gallbladder Meridian, which is characterized by abundant Qi but deficient blood. The ulcer arises above the hip bones, gradually enlarging with pain in both sinews and bones. If it ulcerates and flows with fluid ceaselessly, death ensues. If ulcers and swelling appear on both sides of the hips facing each other, none out of ten will survive. Sleep on a cushion made of Da Ma Pi Bo (likely referring to a specific herbal preparation or material), preventing friction. Internally treat with Bu Zhong Yi Qi Tang (Tonify the Middle and Augment the Qi Decoction).