微寒。主鬼疰，狂，邪气，恶毒。
陶隐居云∶此竹篱头水也，及空树中水，皆可饮，并洗诸疮用之。今按陈藏器本草云∶
半
天
河，在槐树间者主诸风及恶疮，风瘙疥痒，亦温取洗疮，今注《唐本》元在草部，今移。臣
禹锡等谨按药性论云∶半天河，单用。此竹篱头水及高树穴中盛天雨，能杀鬼精，恍惚妄
语，勿令知之与饮，瘥。日华子云∶平，无毒。主蛊毒。
外台秘要∶治身体白驳。取树木孔中水洗之，捣桂屑，唾和敷驳上，日再。白驳者，浸
淫渐
长似癣，但无疮也。
衍义曰∶半天河水，一水也。然用水之义有数种，种各有理。如半天河水，在上天泽水
也，
故
治心病、鬼疰、狂、邪气、恶毒。腊雪水，大寒水也，故解一切毒，治天行时气、温疫、热
痫
、丹石发、酒后暴热、黄胆。井华水，清冷澄澈水也，故通九窍，洗目肤翳及酒后热痢。后
世又用东流水者，取其快顺疾速，通关下膈者也。倒流水者，取其回旋留止，上而不下者也
。
主忤死。先以衣三重，藉忤死人腹上，乃取铜器若瓦器盛汤着衣上，汤冷者去衣，大
冷者换汤，即愈。又霍乱，手足转筋。以铜器若瓦器盛汤熨之，亦可令蹋器使脚底热彻，亦
可以汤捋之，冷则易，用醋煮汤更良，煮蓼子及吴茱萸汁亦好。以锦絮及破毡角脚，以汤淋
之，贵在热彻。又缲丝汤，无毒，主蛔虫。热取一盏服之，此煮茧汁，为其杀虫故也。又
猪汤，无毒，主产后血刺心痛欲死，取一盏温服之。（新补见《抱朴子》、陈藏器。）
陈藏器云∶凡初觉伤寒三日内，但取热汤饮之，候吐则止，可饮一、二升，随吐，汗出
瘥。
重
者亦减半。又冻疮不瘥者，热汤洗之效。野人闲话《朱真人灵验篇》∶有病者，患风疾数年
不较。掘坑令患者解衣坐于坑内，逐以热汤上淋之。良久，复以簟盖之，瘥。别说云∶谨按
《外台秘要》有作甘烂水法∶以木盆盛水，杓扬千百下，泡起作珠子五、六千颗，撇取治霍
乱及入膀胱，治奔豚，药用殊胜。《伤寒论》第三卷，亦有此法。
衍义曰∶热汤，助阳气，行经络。患风冷气痹人，多以汤渫脚至膝上，浓覆使汗出周身。
然
别
有药，亦终假汤气而行也。四时暴泄利，四肢冷，脐腹疼，深汤中坐，浸至腹上，频频作，
生阳佐药，无速于此。虚寒人始坐汤中必战，仍常令人伺守。
微寒。主治鬼疰（一种具有传染性、症状变幻莫测的慢性消耗性疾病）、狂证、邪气侵袭以及恶毒之症。
陶弘景说：这是竹篱笆头部的积水，以及空心树干中的雨水，都可以饮用，也可以用来清洗各种疮疡。现在考证陈藏器的《本草》记载：半天河，位于槐树间的（积水）主治各种风病及恶疮、皮肤瘙痒疥癣，也宜温热后取来清洗疮口。此前在注疏《新修本草》时，它原本归类在草部，现在移入此处。臣禹锡等人谨按《药性论》记载：半天河，单用即可。这种竹篱头积水和高处树穴中积聚的天雨，能够杀灭鬼精（指致病的邪祟或寄生虫等），使人出现精神恍惚、胡言乱语的症状，不要让患者知道是喝的这个水，给他喝下，病就好了。日华子说：性平，无毒。主治蛊毒。
《外台秘要》：治疗身体上的白驳风（白癜风）。取树木孔洞中的水清洗患处，捣碎桂屑，用唾液调和敷在白斑上，每天两次。白驳风，是指逐渐浸润生长、类似癣病但无疮口的皮肤病。
《衍义》说：半天河水，本质上是一类水。然而用水的道理有多种，每种各有其理。比如半天河水，属于高处的天泽之水，所以能治疗心病、鬼疰、狂证、邪气侵袭和恶毒之症。腊雪水，是大寒之水，所以能解一切毒，治疗流行时气、温疫、热痫、丹石发作、酒后暴热、黄疸。井华水（清晨第一次汲出的井水），是清冷澄澈的水，所以能通利九窍，清洗眼目肤翳以及酒后热痢。后世又使用东流水，取其快速顺畅、通关开膈的作用。倒流水，取其回旋停留、向上而不向下的特性。
主治忤死（因受惊吓或邪气冲击导致的假死状态）。先用三层衣服垫在忤死者的腹部上，然后取铜器或瓦器盛满热水放在衣服上，水凉了就去掉衣服，水太冷就更换热水，这样就能痊愈。另外对于霍乱、手足转筋（抽筋），用铜器或瓦器盛热水熨烫患处，也可以让人踩在器具上使脚底热度透达全身，也可以用热水揉搓，冷了则更换，如果用醋煮水效果更好，煮蓼子和吴茱萸汁也不错。用锦絮和破毡角覆盖脚部，用热水淋洗，关键在于热量要透达。还有缲丝汤（煮茧抽丝的水），无毒，主治蛔虫。温热时取一杯服用，这是煮茧的汁液，因为它有杀虫的作用。还有猪汤（煮猪肉的水），无毒，主治产后血刺心痛欲死，取一杯温服。（新增补录见于《抱朴子》、陈藏器。）
陈藏器说：凡是刚觉得伤寒三天内，只取热汤饮用，等到吐出来就停止，可以喝一、二升，随着呕吐，出汗后病愈。重症者减半。另外冻疮久不愈合的，用热汤清洗有效。野人闲话《朱真人灵验篇》：有病人，患风疾多年不好。挖个坑让患者脱衣坐在坑内，随后用热汤从上往下淋浇。过了很久，再用席子盖住，病就好了。别说云：谨按《外台秘要》中有制作甘烂水的方法：用木盆盛水，用勺子扬洒千百下，泡沫升起形成五六千颗珍珠大小的水泡，撇取上层水用于治疗霍乱及入膀胱，治疗奔豚（气从少腹上冲心胸的病证），药用效果特别显著。《伤寒论》第三卷，也有这种方法。
《衍义》说：热汤，能助长阳气，通行经络。患有风冷气痹的人，多用热水浸洗双脚至膝盖以上，厚厚覆盖以使周身出汗。然而另有药物，最终也要借助汤气来发挥作用。四季突发泄泻，四肢冰冷，脐腹疼痛，坐于深热水中，浸泡至腹部，频繁进行，生发阳气辅助药物，没有比这更快的了。虚寒体质的人刚开始坐进热水中一定会发抖，仍需常让人守候看护。
Slightly cold. It governs Gui Zhu (a contagious, chronic wasting disease with shifting symptoms), mania, pathogenic qi invasion, and malignant toxins.
Tao Hongjing stated: This is water collected at the top of bamboo fences, as well as rainwater in hollow trees; all can be drunk and also used to wash various sores. Current examination of Chen Cangqi's Materia Medica states: Ban Tian He (Halfway River Water) located between locust trees governs various wind diseases and malignant sores, skin itching and scabies; it is also suitable to take warm water to wash sores. Previously, when annotating the *Xin Xiu Ben Cao* (Newly Revised Materia Medica), it was originally classified in the Grass section, now moved here. Ministers Yu Xi et al. respectfully followed the *Yao Xing Lun* (Treatise on Medicinal Properties): Ban Tian He, used alone. This bamboo fence head water and heavenly rain gathered in high tree holes can kill ghost essences (pathogenic evil spirits or parasites); for those suffering from mental confusion and delirious speech, do not let them know they are drinking this, give it to them to drink, and the illness will heal. Ri Hua Zi stated: Neutral nature, non-toxic. Governs Gu Du (Gu poison).
*Wai Tai Mi Yao* (Essential Prescriptions Worth a Thousand Gold for Emergencies): Treats Bai Bo Feng (Vitiligo/White patches). Take water from tree holes to wash the area, crush cinnamon bark, mix with saliva, and apply to the white patches twice daily. Bai Bo refers to a skin condition that gradually spreads like tinea but without sores.
*Yan Yi* (Supplementary Meaning) states: Ban Tian He water is essentially one type of water. However, the principles of using water vary, each having its own rationale. For instance, Ban Tian He water is heavenly dew/water from high places, thus it treats Heart disease, Gui Zhu, mania, pathogenic qi invasion, and malignant toxins. Laxue Shui (Snow water from the twelfth lunar month) is extremely cold water, thus it resolves all toxins, treats epidemic febrile diseases, warm plague, heat epilepsy, Dan Shi Fa (side effects of mineral drugs), post-alcohol sudden heat, and jaundice. Jing Hua Shui (Well water drawn at dawn) is clear, cold, and transparent water, thus it opens the nine orifices, washes eye cataracts and skin opacities, and treats post-alcohol heat dysentery. Later generations also used Dong Liu Shui (East-flowing water), taking advantage of its fast and smooth flow to open passages and resolve diaphragmatic obstruction. Dao Liu Shui (Backward-flowing water) is taken for its swirling and stagnating nature, moving upward rather than downward.
It governs Wu Si (Pseudo-death caused by shock or evil qi). First, place three layers of clothing on the abdomen of the person who has suffered pseudo-death, then take a copper or earthenware vessel filled with hot water and place it on the clothing. If the water cools, remove the clothing; if too cold, replace the water, and the patient will recover. Additionally, for Huo Luan (Cholera-like syndrome) and convulsions of the hands and feet, use a copper or earthenware vessel filled with hot water to moxa/iron the affected areas. One can also step on the vessel to make the heat penetrate the soles of the feet, or rub with hot water, changing it when cool. Using vinegar-boiled water is better; boiling Polygonum hydropiper seeds and Evodia juice is also good. Cover the feet with silk wadding and broken felt corners, pour hot water over them, ensuring the heat penetrates thoroughly. Also, Silk Reeling Soup (water used for boiling cocoons) is non-toxic and governs roundworms. Drink one cup while warm; this is the juice from boiling cocoons, which kills parasites. Furthermore, Pork Soup (water used for boiling pork) is non-toxic and governs postpartum blood-stasis stabbing heart pain leading to near-death state; take one cup warm. (Newly supplemented, seen in *Baopuzi*, Chen Cangqi.)
Chen Cangqi said: Whenever one initially feels signs of Shang Han (Cold Damage) within three days, simply drink hot water until vomiting occurs, then stop. One may drink one to two sheng (units of volume); following vomiting and sweating, the illness heals. Severe cases reduce the dose by half. Also, for frozen sores that do not heal, washing with hot water is effective. *Ye Ren Xian Hua* (Idle Talk of Wild Men) *Zhu Zhenren Lingyan Pian*: A patient suffered from wind disease for years without improvement. Dig a pit, have the patient sit naked in it, and then pour hot water over them from above. After a long time, cover them with a mat, and the illness heals. Bie Shuo says: Respectfully following *Wai Tai Mi Yao*, there is a method for making Gan Lan Shui (Sweet Rotten Water): Fill a wooden basin with water, ladle and splash it thousands of times until bubbles rise forming five to six thousand pearl-sized droplets, skim off the upper layer water to treat Huo Luan and enter the Bladder channel to treat Ben Tun (Gas rushing from lower abdomen to chest), the medicinal effect is particularly superior. Volume 3 of *Shang Han Lun* (Treatise on Cold Damage Disorders) also contains this method.
*Yan Yi* states: Hot water assists Yang Qi and promotes circulation through the meridians. Patients suffering from wind-cold qi bi-obstruction often soak their feet in hot water up to the knees, covering thickly to induce sweating throughout the body. However, other medicines ultimately rely on the steam/heat of water to act. For sudden diarrhea in any season with cold limbs and umbilical/abdominal pain, sitting in deep hot water, immersing up to the abdomen, performed frequently, generates Yang Qi to assist medication; nothing is faster than this. People with deficiency-cold constitution will inevitably shiver when first sitting in hot water, so someone should always stay nearby to monitor.