痒有因风因火因血虚而痒者，大约以降火为主，然有为血行而痒，目将复明，火散发痒
宜平肝滋荣为主。
痒如虫行，病属肝心，无病而痒，病始来侵，有疾而痒，其病愈深，常时小痒，又当辨
明，轻重进退，宜审其因。此症非谓常时小痒之轻，如虫行之痒，不可忍者，须验目上有无
形症，决其病之进退，至于有障无障，皆有痒极之患，病源非一。有风邪之痒，有邪退火息
气血得行，脉络通畅而痒。大抵有病之目，久不治而作痒者，痒一番则病重一番。若医治
用药后而痒作者，病必去速。若痒极难当，时时频作，目觉低陷者，命亦不久矣。有痒极而
目脱者，死期近矣。泪多者血虚夹火，大抵痛属实，痒属虚，虽火乘虚而入，非其本病也。
宜服∶
驱风一字散 治目痒极难忍。
川乌（炮） 川芎 荆芥穗（各五钱） 羌活 防风（各二两五钱）
上为细末。每服二钱，食后苏薄荷汤调下。
人参羌活汤 治肝热涩痒昏蒙。
赤茯苓 人参 羌活 独活 地骨皮 川芎 柴胡 桔梗 细甘草 枳壳 前胡 天麻
（各等分）
上锉剂。白水二钟，煎至八分，去滓热服。痒甚者，加防风、荆芥穗。
广大重明汤 治两目睑赤烂热肿痛，并梢赤，及眼睑痒极，抓至破烂，眼楞生疮痂，目
多眵痛，瘾涩难开。
防风 川花椒 龙胆草 甘草 细辛（各等分）
上锉如麻豆许大，内甘草不锉，只作一挺。先以水一大碗半，煎龙胆草一味，干一半，
再入余三味，煎至小半碗，去滓，用清汁带热洗，以重汤炖令极热。日用五七次，洗毕，合
眼须臾，痒亦减矣。
目痒的成因，有的是因为风邪，有的是因为火邪，有的是因为血虚所致。治疗上大致以降火为主。然而，也有因血液运行通畅而出现的瘙痒，这是眼睛即将恢复光明的征兆；或者是火邪发散时出现的瘙痒，治疗宜以平肝、滋养营血为主。
如果感觉痒如虫行，病位属于肝和心。没有疾病时却感到痒，说明病邪刚开始侵袭人体；已有疾病时感到痒，说明病情已经深入。平时偶尔轻微发痒，也应当辨别清楚，根据病情的轻重和进退变化，仔细审察其病因。此症并非指平时轻微的瘙痒，而是像虫行一样难以忍受的剧烈瘙痒。必须检查眼睛表面是否有形态上的病变，以此判断疾病的进退情况。至于眼睑上有障翳或无障翳，都可能出现极度的瘙痒，其病源各不相同。有的因风邪侵袭而痒，有的因邪气退去、火邪平息、气血得以运行、脉络通畅而痒。大抵患有眼疾的眼睛，若长期不治疗而出现瘙痒，那么每次发作瘙痒，病情就会加重一次。若是经过医生用药治疗后出现瘙痒，说明病邪必将迅速去除。如果瘙痒极度难忍，频繁发作，且感觉眼球凹陷下陷，那么生命也就为期不远了。有的因极度瘙痒而导致眼球脱出，这是死期临近的表现。流泪多者，多为血虚夹杂火邪。大抵而言，疼痛多属实证，瘙痒多属虚证。虽然火邪乘虚而入，但这并非疾病的根本所在。适宜服用以下方剂：
驱风一字散：治疗眼睛极度瘙痒难以忍受。
药材：川乌（炮制）、川芎、荆芥穗（各五钱），羌活、防风（各二两五钱）。
制法与用法：将上述药物研成细末。每次服用二钱，饭后用苏薄荷汤调服。
人参羌活汤：治疗肝热引起的涩痛、瘙痒及视物昏蒙。
药材：赤茯苓、人参、羌活、独活、地骨皮、川芎、柴胡、桔梗、细甘草、枳壳、前胡、天麻（各等分）。
制法与用法：将药物切碎。加水两钟，煎煮至八分满，滤去药渣，趁热服用。若瘙痒严重，可加入防风、荆芥穗。
广大重明汤：治疗双眼眼睑红肿溃烂、热痛肿胀，以及眼角发红，还有眼睑极度瘙痒，抓挠至破烂，眼缘生疮结痂，眼中分泌物多且疼痛，眼睑粘连难以睁开。
药材：防风、川花椒、龙胆草、甘草、细辛（各等分）。
制法与用法：将药物切碎如麻豆大小，其中甘草不切碎，只做成一根条状。先取一大碗半水，单独煎煮龙胆草，煮至水量减半，再加入其余三味药，煎煮至剩余小半碗水，滤去药渣，取澄清的药汁带热清洗眼部，并将药汁放在热水中炖至极热。每日使用五到七次，清洗完毕后闭眼片刻，瘙痒即可减轻。
Itching of the eyes may be caused by Wind (Feng), Fire (Huo), or Blood Deficiency (Xue Xu). Generally, the treatment principle is to clear Fire. However, itching occurring due to the smooth circulation of Blood indicates that vision is about to recover; itching caused by the dispersion of Fire should be treated primarily by soothing the Liver and nourishing Ying (Nutritive Qi).
If the sensation is like insects crawling, the disease involves the Liver and Heart. Itching without an underlying disease suggests the initial invasion of pathogenic factors; itching in the presence of existing disease indicates a deeper pathological state. Occasional mild itching requires careful differentiation based on the severity and progression of symptoms to determine the etiology. This condition refers not to mild occasional itching, but to severe, unbearable itching akin to insect movement. One must examine whether there are visible lesions on the eye surface to judge the progression of the disease. Whether glaucoma or cataracts (Zhang) are present or absent, extreme itching can occur, with various etiologies. Itching may result from Wind-Evil invasion, or from the resolution of pathogens and Fire, allowing Qi and Blood to circulate freely and meridians to become unobstructed. Generally, if an affected eye remains untreated for a long time and develops itching, each episode of itching signifies a worsening of the condition. Conversely, if itching occurs after medical treatment, it indicates that the pathogenic factors are being rapidly expelled. If itching is extremely intolerable, frequent, and accompanied by a sunken appearance of the eyeball, life expectancy is short. In cases where extreme itching leads to the prolapse of the eyeball, death is imminent. Excessive tearing often indicates Blood Deficiency combined with Fire. Generally, pain belongs to Excess patterns, while itching belongs to Deficiency patterns. Although Fire may invade due to deficiency, this is not the root cause of the disease. The following prescriptions are suitable:
Qufeng Yizi San (Wind-Expelling One-Character Powder): Treats severe, unbearable eye itching.
Ingredients: Chuanwu (Prepared Aconiti Lateralis Radix), Chuanxiong (Chuanxiong Rhizoma), Jingjie Sui (Perillae Folium), Qianghuo (Notopterygii Rhizoma et Radix), Fangfeng (Saposhnikoviae Radix). Dosage: Chuanwu, Chuanxiong, Jingjie Sui (each 5 qian); Qianghuo, Fangfeng (each 2 liang 5 qian).
Preparation and Administration: Grind into fine powder. Take 2 qian per dose, mixed with Su Bohe Tang (Mint Decoction) after meals.
Renshen Qianghuo Tang (Ginseng and Notopterygium Decoction): Treats liver heat causing astringency, itching, and blurred vision.
Ingredients: Chi Fuling (Poria Cocos with Red Skin), Renshen (Ginseng Radix), Qianghuo (Notopterygii Rhizoma et Radix), Duhuo (Angelicae Pubescentis Radix), Digupi (Lycii Cortex), Chuanxiong (Chuanxiong Rhizoma), Chaihu (Bupleuri Radix), Jiegeng (Platycodonis Radix), Xi Gancao (Licorice Root), Zhike (Aurantii Fructus Immaturus), Qianhu (Peucedani Radix), Tianma (Gastrodiae Rhizoma). Dosage: Equal parts.
Preparation and Administration: Cut into pieces. Add two zhong of water, decoct until reduced to eight-tenths, strain, and take hot. For severe itching, add Fangfeng and Jingjie Sui.
Guangda Chongming Tang (Broad and Heavy Brightening Decoction): Treats redness, ulceration, heat, swelling, and pain of both eyelids, redness at the canthi, extreme eyelid itching leading to excoriation, sores and scabs on the eyelid margins, excessive discharge with pain, and difficulty opening the eyes due to adhesion.
Ingredients: Fangfeng (Saposhnikoviae Radix), Chuan Huajiao (Zanthoxyli Pericarpium), Longdan Cao (Gentianae Radix), Gancao (Licorice Root), Xixin (Asari Radix et Rhizoma). Dosage: Equal parts.
Preparation and Administration: Cut into pieces the size of hemp seeds, except for Gancao, which should remain whole as a stick. First, decoct Longdan Cao alone in one and a half bowls of water until the volume is halved. Then add the remaining three herbs and decoct until only a small half-bowl remains. Strain and use the clear liquid to wash the eyes while warm. Heat the liquid further in a double boiler until very hot. Use five to seven times daily. After washing, close the eyes for a moment, and the itching will subside.