大风症名，考究诸书悉无遗失，《病源》云∶风、癞一症，轻重之别耳，其害则一也。
癞愈形犹可复，风愈元气难全。癞死者少，风死者多，大都皆非善症辙迹一类。
曰火曰蟋蟀，心之癞也。
此症初起如火灼之疮，大小不一，或如癣皮裂断肢趾，愈又复发，由心脏受毒七年
，病根
方盛，眉睫落，大势成手足痿。又有一种遍身点滴红紫，生于皮肤之上，形似瘢痕之状
不过十数日渐自散去，或五六日亦自散，复结心毒生疮，不能速愈，亦能传注于人。
此症乃火癞之后余毒内结变成，形如蟋蟀，虫纹内泛钻啮百节，诸窍皆欲出血，额烂
鼻朽
，口唇毁断，齿牙脱落，瘫痪难动，或时惊跳战兢，多惧或眼赤烂泪疼，乃心火焰烈也。
曰木曰风，肝之癞也。
此症初起如虫癣之状，大小不一，其色赤白不一，或连钱高低不定，俗称棉花疮，久则
连片
腐烂腥秽，眉睫落，面目痒，愈而又作，或去或来无时，定息三年，始成大害，肝败难治。
又有一种如棉花之核，其粒高起硬 者，火变成蚀癣不愈。
此症乃木癞之后，毒蓄肝经，则四肢骨节筋骱掣痛，甚者叫唤，不能转侧，皮毛枯槁，
肘膝大
小状如鹤膝白虎风，腐秽瘫痪，声变形异，或结于胁肋腹肚，上烂至肠胃，或烂去耳HT ，
皆癞之毒也。
曰土曰 ，脾之癞也。
“大风症”这一名称，在查阅各类医书后均无遗漏记载。《诸病源候论》（简称《病源》）中说：风癞与癞疮，只是病情轻重的区别罢了，其危害本质是一样的。
癞疮治愈后形体尚可恢复，而风癞治愈后元气却难以完全复原。患癞疮死亡的人较少，患风癞死亡的人较多，这两者大多都不属于良善的病症范畴。
此症初起时如同火烧般的疮疡，大小不一，有的像癣皮一样裂开，甚至导致肢体、脚趾坏死脱落，痊愈后又复发。这是因为心脏受毒七年，病根方才强盛，导致眉毛睫毛脱落，病情大势形成后出现手足痿软无力。又有一种情况是全身散布红紫色的点滴斑疹，生于皮肤表面，形状类似瘢痕，不过十几天便会自行消散，或者五六天也自行消散；但随后心毒再次生疮，不能迅速痊愈，且具有传染性，能传染给他人。
这种病症是在火癞之后，余毒内结转化而成。外形如蟋蟀，虫纹在内浮现，感觉有虫子钻咬百节，各个孔窍都好像要出血，额头溃烂，鼻子腐朽，口唇毁坏断裂，牙齿脱落，身体瘫痪难以活动，有时惊恐跳跃、战栗发抖，多恐惧，或者眼睛红肿溃烂、流泪疼痛，这是心火炽烈所致。
此症初起时如同虫癣的样子，大小不一，颜色赤白不均，有的呈连钱状高低不平，俗称“棉花疮”。时间久了则成片腐烂，气味腥臭秽浊，眉毛睫毛脱落，面目瘙痒，好了又发作，或去或来没有定时，经过三年才酿成大害，此时肝气败坏，难以治疗。又有一种情况像棉花的核，颗粒高起且坚硬，由火毒转化而成的蚀癣，久不愈合。
这种病症是在木癞之后，毒邪蓄积于肝经，导致四肢骨节筋腱关节牵拉疼痛，严重时呼叫喊痛，不能翻身侧卧，皮毛干枯枯槁，肘膝关节肿大变形，状如鹤膝风或白虎风，腐败秽浊，瘫痪，声音改变形态怪异，或者结聚于胁肋腹部，向上溃烂至肠胃，或者烂掉耳朵，这些都是癞疮毒邪所致。
The term "Da Feng Zheng" (Great Wind Syndrome) is comprehensively documented in various medical texts without omission. *Zhu Bing Yuan Hou Lun* (Source Book of All Pathologies and Symptomatology) states: "Feng Lai" (Wind Leprosy) and "Lai Chuang" (Leprous Sores) differ only in severity, but their harmful nature is identical.
After Lai Chuang heals, the physical form can be restored; however, after Feng Lai heals, the primordial Qi (vital energy) is difficult to fully recover. Few die from Lai Chuang, while many die from Feng Lai; generally, neither belongs to favorable syndromes.
"Huo Lai" (Fire Leprosy) and "Xi Shuai Lai" (Cricket Leprosy) refer to Heart Lai, caused by pathogenic factors affecting the Heart.
This syndrome initially presents as sores resembling burns, varying in size. Some resemble tinea with cracking skin, potentially leading to necrosis and loss of limbs or toes. It recurs after healing because the heart has been poisoned for seven years, allowing the disease root to flourish. Eyebrows and eyelashes fall out, and the condition progresses to flaccidity and weakness of the hands and feet. Another manifestation involves scattered red-purple macules on the skin, resembling scars, which may resolve spontaneously within ten days or even five to six days. However, heart toxins subsequently generate sores that do not heal quickly and are contagious, capable of transmitting to others.
This condition arises from residual toxins consolidating internally following Huo Lai. The appearance resembles a cricket, with worm-like patterns emerging internally, causing sensations of insects burrowing through the joints. Various orifices appear ready to bleed; the forehead ulcerates, the nose rots, lips are destroyed and severed, teeth fall out, paralysis makes movement difficult, and there may be sudden惊跳 (startle/jumping), trembling, and excessive fear. Eyes may become red, ulcerated, tearful, and painful, indicating intense Heart Fire.
"Mu Lai" (Wood Leprosy) and "Feng Lai" (Wind Leprosy) refer to Liver Lai, caused by pathogenic factors affecting the Liver.
This syndrome initially presents like insect-induced tinea, varying in size and color (red or white). Some appear as linked coins with uneven surfaces, commonly known as "Mian Hua Chuang" (Cotton Sore). Over time, they merge into patches of foul-smelling rot. Eyebrows and eyelashes fall out, the face and eyes itch, and the condition recurs intermittently without a fixed schedule. After three years, it becomes a severe affliction; when liver function fails, it is difficult to treat. Another variant resembles cotton seeds, with raised, hard nodules resulting from fire-toxin transformation into erosive tinea that does not heal.
This condition arises after Mu Lai, where toxins accumulate in the Liver Meridian. This causes pulling pain in the tendons and joints of the four limbs. In severe cases, patients cry out in pain and cannot turn over. Skin and hair become dry and withered. Elbows and knees swell and deform, resembling He Xi Feng (Crane Knee Wind) or Bai Hu Feng (White Tiger Wind). There is putrefaction, foulness, paralysis, altered voice, and distorted appearance. Toxins may also gather in the hypochondrium and abdomen, spreading upward to ulcerate the intestines and stomach, or erode the ears. These are all manifestations of Lai toxin.
"Tu Lai" (Earth Leprosy) and "Pi Lai" (Spleen Leprosy) refer to Spleen Lai, caused by pathogenic factors affecting the Spleen.