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Wenkang Wang stated: Donggua Chuan (Winter Melon String) arises between the two arms, measuring two to three cun in length, presenting with redness, swelling, and elevation, accompanied by pain and an absence of a discernible head.
It should be treated according to the principles for treating carbuncles and sores (Yong Ju Men). (From *Zhunsheng*)

Verified Prescription (From *Gangmu*): Mash castor seeds (*Ricini Semen*, 蓖麻子) into a paste and apply it; it will heal spontaneously overnight.
Another Prescription (From *Zhunsheng*): Take an unspecified amount of sheep feces, grind it together with sesame oil, and apply externally.

Shouyuan Shen stated: Chen Gan Chuang (Chronic Liver Sore) is a pathology of the Hand-Shaoyang Sanjiao Meridian (Triple Burner Meridian of Hand-Taiyang). It appears in three to five locations on both upper arms, resembling boils, with unbearable pain that cannot be touched or rubbed. If there is a head, it can be punctured after fourteen days; if there is no head, and symptoms include fever, flaccid hardness of the body, and ruddy complexion, death will occur within twenty-eight days. It is also known as Zao Ju (Flea Carbuncle). Sores arising from the hand may transform and spread along the Hand-Yin and Hand-Yang meridians, leading to death in three years; if itching is severe, death occurs within one month. (From *Qixuan*)

Shigong Chen stated: This condition results from excessive thinking injuring the Spleen, causing Qi stagnation in the Spleen. The lesions mostly arise on both hands. Initially, there is pain deep in the bone, gradually developing into diffuse swelling that is hard, without heat or redness. Multiple swollen areas appear on the back of the hand and around the Neiguan acupoint, preventing movement. Over time, fluid resembling tofu curd leaks out, connecting various orifices, dripping day and night, while pain and swelling persist. The patient inevitably presents with sallow complexion, emaciation, and reduced appetite. Only by harmonizing Qi and Blood and supporting the Spleen and Stomach can survival be expected; among ten cases, one or two may recover. If treatment is improper, and cold-cooling and purgative drugs are recklessly administered, damaging the Spleen and Stomach, few will survive. The treatment method involves using Yiqi Yangrong Tang (Qi-Nourishing and Blood-Enriching Decoction) from beginning to end, primarily guided by Jiawei Xiaoyao San (Modified Free and Easy Wanderer Powder). (From *Zhengzong*)

He further stated: This disease mostly affects individuals with thin and deficient Qi and Blood. Since the four limbs belong to the Earth element of the Spleen, they predominantly occur on both hands.

Dongyuan Li stated: Lougu Chuan (Mole Cricket String), named after the mole cricket, is an insect whose shape resembles a dragonfly, with short wings and a long tail, fond of wind and water. Therefore, patients with this condition will heal easily if not ulcerated; however, if ulcerated and pus continues to drain, it will inevitably spread upward to the Jianjing acupoint and downward to the elbow. One lesion spreads to two, two to three. Neglected treatment leads to erosion by pus and blood, causing severe bone and tendon pain. This originates from dampness affecting the Five Zang organs and heat accumulating in the Six Fu organs, thus damaging the skin externally and forming this toxicity.

Danxi Zhu stated: Lougu Chuan arises on the medial aspect of the arm, belonging to the Pericardium Meridian. It is caused by excessive thinking injuring the Spleen; when the Spleen is injured, its transportation and transformation slow down, producing turbid fluids that flow into the muscles. Spleen Qi stagnates and fails to circulate freely, condensing to form the lesion. Initially, the bones and tendons feel as if struck by an arrow, with increasing pain, diffuse swelling that is hard, non-red, and non-hot, involving multiple swollen areas, rendering the arm immobile. Over time, the mass gradually ulcerates, leaking white fluid from each pore. Internal ulceration connects various holes, while external swelling and rupture do not subside, with pus and blood dripping like a leak. Deficiency patterns manifest as sallow complexion, poor appetite, and emaciation; even worse, alternating chills and fever in the afternoon develop, resulting in a critical stage. Initially, Xiaoyao San (Free and Easy Wanderer Powder) should be used, followed by Renshen Yangrong Tang (Ginseng Decoction for Nourishing Qi and Blood) to harmonize Qi and Blood and support the Spleen and Stomach; among ten cases, three or four may be saved.