痘出时是红色，五六天后忽变清浆，次变白浆，次变混浆，次变黄脓，终而结痂。古人
谓痘
之变清水、白浆、混浆、黄脓乎？痘本血管内血中浊气，遇天行逐浊气之瘟疫，自口鼻而入
于气管，达于血管，将血管中浊气与血，并气管中津液，逐之自毛孔而出，所以形圆色红，
五六天后，痘中之血，仍退还血管，痘内止存浊气津液，津液清，名曰清浆。清浆为瘟毒烧
炼，稠而色白，故名白浆。白浆再炼，再稠而混，故名混浆。混浆再炼，稠如疮脓，故名黄
脓。将黄脓炼干而结痂。痘不行浆，皆因血不退还血管，血不退还血管，皆因血管内有瘟毒
烧炼，血凝阻塞血之道路，若通血管之瘀滞，何患浆之不行？
出痘有四五天、七八天饮水即呛者，古人论毒火壅于咽喉，列于不治之症。总是不明咽
喉左
，名左气门、右气门。舌根有一白片，其浓如钱，名曰会厌，正盖肺管、左右气门上口。人
咽饮食，必以舌尖抵上 ，使会厌将肺管与左右气门盖严，饮食方可过肺管、左右气门，入
后之胃管。试看人吃饭，饮食将入嗓至喉，未入咽时，或忽然冷笑，气暴上冲，会厌一开，
或一粒米、一滴水，入左右气门，立刻由鼻呛出，是其证也。今瘟毒烧炼，会厌血凝，不能
盖严气门，故饮水渗入即呛。食不呛者，因微微小缝，能渗水而食不能入，故不呛。化开会
厌中瘀血，其呛立止。
痘疹发出时呈红色，经过五六天后突然变成清澈的浆液，接着变为白色的浆液，再变为浑浊的浆液，随后变为黄色的脓液，最后结成痂皮。古人认为痘疹的变化是清水、白浆、混浆、黄脓吗？痘疹本质上是血管内血液中的浊气，遇到具有逐除浊气作用的瘟疫之气，从口鼻进入气管，到达血管，将血管中的浊气与血液，以及气管中的津液，驱逐出毛孔，所以痘疹形状圆润、颜色发红。五六天后，痘疹中的血液仍退还至血管中，痘疹内部仅存留浊气和津液，津液清澈，称为清浆。清浆被瘟毒烧炼，变得稠厚且颜色发白，所以称为白浆。白浆再次被烧炼，变得更加稠厚且浑浊，所以称为混浆。混浆再次被烧炼，稠厚如同疮疡的脓液，所以称为黄脓。将黄脓炼干后结成痂皮。痘疹不能行浆（化脓成熟），都是因为血液没有退还到血管中；血液不能退还到血管中，都是因为血管内有瘟毒烧炼，导致血液凝结阻塞了血液运行的道路，如果疏通血管中的瘀滞，还担心浆液不能形成吗？
出痘疹后四五天或七八天，饮水时就发生呛咳的，古人论述为毒火壅塞于咽喉，将其列为不治之症。这总是不明白咽喉左侧和右侧的结构，名为左气门、右气门。舌根处有一片白色组织，其浓密如铜钱大小，名为会厌，正好覆盖在肺管（气管）和左右气门的上方开口处。人吞咽饮食时，必须用舌尖抵住上颚，使会厌将肺管和左右气门的开口严密盖住，饮食才能通过肺管和左右气门，进入后面的胃管。试看人吃饭时，饮食即将进入嗓子至喉咙，还未进入咽部时，如果忽然冷笑，气息猛烈上冲，会厌就会张开，此时若有一粒米或一滴水进入左右气门，立刻会从鼻子呛出，这就是其症状表现。现在瘟毒烧炼，导致会厌部位血液凝结，不能严密盖住气门，所以饮水渗入就会发生呛咳。进食不呛咳的原因，是因为微小的缝隙能渗透水但食物不能进入，所以不呛咳。化解会厌中的瘀血，其呛咳症状立即停止。
When the smallpox rash appears, it is red. After five or six days, it suddenly changes to clear fluid (Qingjiang), then to white fluid (Baijiang), then to turbid fluid (Hunjiang), then to yellow pus (Huangnong), and finally forms a scab. Did the ancients consider the changes of smallpox to be clear fluid, white fluid, turbid fluid, and yellow pus? Smallpox is essentially turbid qi within the blood in the blood vessels. When encountering epidemic pestilence that expels turbid qi, it enters through the mouth and nose into the respiratory tract (Qi Guan), reaches the blood vessels, and drives the turbid qi and blood from the blood vessels, along with the body fluids (Jin Ye) from the respiratory tract, out through the hair pores. Thus, the lesions are round in shape and red in color. After five or six days, the blood within the smallpox lesions returns to the blood vessels, leaving only turbid qi and body fluids inside the lesions. Since the body fluids are clear, they are named "clear fluid" (Qingjiang). The clear fluid is refined by the pestilential toxin, becoming thick and white in color, hence named "white fluid" (Baijiang). The white fluid is refined again, becoming thicker and turbid, hence named "turbid fluid" (Hunjiang). The turbid fluid is refined once more, becoming as thick as pus from sores, hence named "yellow pus" (Huangnong). The yellow pus is dried up and forms a scab. The failure of smallpox to mature into pus (Xing Jiang) is due to the blood not returning to the blood vessels; the reason the blood does not return to the blood vessels is that the pestilential toxin refines within the blood vessels, causing blood coagulation and blocking the pathway of blood flow. If the stasis in the blood vessels is unblocked, why worry about the failure of pus formation?
For those who experience choking when drinking water four or five days or seven or eight days after the onset of smallpox, the ancients discussed this as toxic fire obstructing the throat and listed it among incurable conditions. This stems from a lack of understanding of the anatomy of the throat, specifically the left Qi Gate (Zuo Qi Men) and right Qi Gate (You Qi Men). At the root of the tongue, there is a white flap, dense like a coin, called the epiglottis (Hui Yan), which covers the opening of the trachea (Fei Guan) and the left and right Qi Gates. When swallowing food and drink, one must press the tip of the tongue against the hard palate, causing the epiglottis to tightly cover the trachea and the openings of the left and right Qi Gates, allowing food and drink to pass through the trachea and Qi Gates into the esophagus (Wei Guan) behind. Observe people eating: when food and drink enter the throat but have not yet reached the pharynx, if one suddenly laughs coldly, causing a violent upward rush of qi, the epiglottis opens. If a grain of rice or a drop of water enters the left or right Qi Gate, it will immediately choke out through the nose; this is the manifestation of the condition. Currently, pestilential toxin refinement causes blood coagulation in the epiglottis, preventing it from tightly covering the Qi Gates, thus causing choking when water seeps in. Eating does not cause choking because the tiny gap allows water to seep in but prevents food from entering, hence no choking. Resolving the blood stasis in the epiglottis will immediately stop the choking.