宛丘营军校三人，皆病痿，积年不瘥。腰以下，肿痛不举，遍身疮赤，两目昏暗
，唇干舌燥，求疗于戴人。戴人欲投泻剂，二人不从，为他医温补之药所惑，皆死。其同病
有宋子玉者，俄省曰∶彼已热死，我其改之？敬邀戴人。戴人曰∶公之疾，服热药久矣。先
去其药邪，然后及病邪，可下三百行。子玉曰∶敬从教。先以舟车丸、浚川散，大下一盆许。
明日减三分，两足旧不仁，是日觉痛痒。累至三百行始安。戴人曰∶诸痿独取阳明。阳明
者，胃与大肠也。此言不止谓针也，针与药同也。
一男子，病口疮数年，上至口，中至咽嗌，下至胃脘，皆痛，不敢食热物。一涌
一泄一汗，十去其九；次服黄连解毒汤，不十余日皆释。
西华束茂之，病虚劳寝汗，面有青黄色，自膝以下，冷痛无汗，腹中燥热。医以
姜、附补之，五晦朔不令饮水，又禁梳头，作寒治之。请于戴人。戴人曰∶子之病，不难
愈，难于将护，恐愈后阴道转茂，子必不慎。束生曰∶不敢。戴人先以舟车丸、浚川散，下
五、七行。心
火下降，觉渴，与冰水饮之，又令澡浴，数日间面红而泽。后以河水煮粥，温养脾胃。河水
能利小溲。又以活血当归丸、人参柴胡散、五苓散、木香白术散调之。病大瘥，寝汗皆止，
两足日暖，食进。戴人常曰∶此本肺痹，当以凉剂。盖水之一物，在目为凉，在皮为汗，
在下为小溲。谷多水少为常，无水可乎？若禁饮水必内竭，内竭则燥热生焉。人若不渴，与水亦不肯饮之
矣。束生既愈，果忘其戒，病复作。戴人已去，乃殂。
Three military officers in the camp of Wanchou all suffered from Wei syndrome (Flaccidity Syndrome), which had persisted for years without healing. Below the waist, they experienced swelling, pain, and inability to move; their entire bodies were covered with red sores, and their eyesight was dim. They sought treatment from Dai Ren (Zhang Congzheng). Dai Ren intended to administer purgative agents, but two of them refused, having been misled by warm-tonic medicines prescribed by other physicians; both eventually died. Among those suffering from the same condition was Song Ziyu. After a short while, he realized: "They have already died from heat toxicity; should I not change my approach?" He respectfully invited Dai Ren. Dai Ren said, "Your illness has resulted from long-term consumption of hot-natured drugs. First, eliminate the pathogenic factor introduced by the medication, then address the original disease pathogen. You may undergo purgation three hundred times." Song Ziyu replied, "I respectfully obey your teaching." Dai Ren first administered Zhouche Wan (Boat Cart Pill) and Junchuan San (River-Dredging Powder), resulting in a large volume of purgation (approximately one basin). The next day, symptoms decreased by thirty percent. His feet, previously numb and insensible, began to feel pain and itching on that day. After accumulating three hundred purgations, he finally stabilized. Dai Ren stated, "In treating various forms of Wei syndrome, one exclusively targets the Yangming channel. Yangming refers to the Stomach and Large Intestine. This principle applies not only to acupuncture but also to herbal medicine; the methods are consistent."
A man suffered from mouth ulcers for several years. The lesions extended from the lips upwards, down through the throat, and further down to the epigastrium, causing pain throughout these areas. He dared not consume hot foods. Following one session of emesis (Yong), one session of purgation (Xie), and one session of diaphoresis (Han), ninety percent of the symptoms were resolved. Subsequently, he took Huanglian Jiedu Tang (Coptis Decoction for Resolving Toxicity), and within ten days, he fully recovered.
Shu Maozhi from Xihua suffered from Xu Lao (Deficiency Consumption) accompanied by night sweats. His complexion showed a bluish-yellow hue. From the knees downward, his legs were cold, painful, and devoid of sweat, while his abdomen felt internally dry and hot. Physicians treated him with Gan Jiang (Dried Ginger) and Fu Zi (Prepared Aconite Root) for warming tonification, forbade him from drinking water for five days and nights, prohibited hair combing, and diagnosed it as a cold pattern. Shu sought help from Dai Ren. Dai Ren said, "Your illness is not difficult to cure, but difficult to manage post-recovery. If you engage in excessive sexual activity after recovery, you will likely fail to exercise caution." Shu replied, "I dare not." Dai Ren first administered Zhouche Wan and Junchuan San, inducing purgation five to seven times. As Heart Fire descended, Shu felt thirsty and was given ice water to drink. He was also instructed to bathe. Within a few days, his face became ruddy and lustrous. Later, he consumed congee cooked with river water to gently nourish the Spleen and Stomach. River water facilitates urination. He was further regulated using Huoxue Danggui Wan (Blood-Invigorating Angelica Pill), Renshen Chaihu San (Ginseng and Bupleurum Powder), Wuling San (Five-Ingredient Powder with Poria), and Muxiang Baizhu San (Aucklandia and Atractylodes Powder). His condition greatly improved; night sweats ceased, his feet warmed daily, and his appetite increased. Dai Ren often remarked, "This was originally Fei Bi (Lung Obstruction), which should be treated with cooling agents. Water manifests as tears (cooling) in the eyes, as sweat on the skin, and as urine below. Normally, grain intake exceeds water intake; how can there be no water? If water intake is forbidden, internal fluids will inevitably deplete, leading to dryness and heat generation. If a person does not feel thirsty, they will refuse even if offered water." After recovering, Shu indeed forgot the warnings, and his illness relapsed. By the time Dai Ren had departed, Shu passed away.