凡治痘而察其初发部位，则预知其轻重吉凶。左颊属于肝木，右颊属于肺金，正额
属于心火，下颏属于肾水，鼻属于脾土。正额者，太阳脉之所会。唇颊者，阳明脉之所
经。两耳后两旁，少阳脉之所过。夫痘为阳毒，故随阳而见于面也。然阳明胃与大肠，
积陈受朽，气血俱多，故先于口鼻两旁，人中上下，两腮年寿之间，先出先浆先靥者，
吉。若太阳则水火交战之处，少阳则水火相并之冲，如先出先浆先靥者，凶。更夫头
者，诸阳聚会之处，两赜颊五脏精华之府咽者，水谷出入之道路，喉者，肺脘呼吸之往
来，胸腹者，诸阳受气之地，为心肺之所居，五处俱要稀少。若头额多者，谓之蒙
头；颈项多者，谓之锁项；胸前多者，谓之瞒胸。蒙头则视听发，气化绝锁项则内不
出。外不入，瞒胸则阳不清，神失守，唇轩先见者，则脾土受伤，两颊两颐，稠密成
片，或如涂朱，则肝盛克脾，八九日当作滑泄，而泻青不食，乃成险候，故并不宜多
也。惟其四肢。如卒伍卑贱，不足重轻，则虽多而无妨，以上诸症俱要解毒清热，疏通
荣卫表里，必使血活气匀，庶可无干枯焦黑之变。然观上可以知下。如印堂之下，应心
胸，鼻下应背部，两额应两腰，两颐应两眼额上之稠密，即可知其下矣。
凡是治疗痘疹（天花）并观察其初发的部位，就可以预先知道病情的轻重和吉凶。左脸颊归属于肝木，右脸颊归属于肺金，正额头归属于心火，下巴归属于肾水，鼻子归属于脾土。正额头是太阳经脉汇聚的地方。嘴唇和脸颊是阳明经脉经过的地方。两耳后两侧，是少阳经脉经过的地方。痘疹属于阳毒，所以随着阳气而显现于面部。然而，阳明经的胃与大肠，积聚陈旧之物接受腐朽之气，气血都很旺盛，所以在口鼻两旁、人中上下、两腮及鼻梁年寿之间先出痘、先灌浆、先结痂的，为吉兆。如果太阳经区域（水火交战之处）、少阳经区域（水火相并之冲要），先出痘、先灌浆、先结痂的，为凶兆。再说头部，是诸阳经聚会的地方；两颊颞部是五脏精华汇聚之所；咽喉是水谷出入的道路；喉管是肺脏呼吸往来的通道；胸腹部是诸阳经受气的地方，也是心肺居住之地，这些部位都要求痘疹稀少。如果头额部痘疹多，称为“蒙头”；颈项部痘疹多，称为“锁项”；胸前部痘疹多，称为“瞒胸”。蒙头会导致视听功能丧失，气化功能断绝；锁项导致内部邪气不能外出，外部正气不能内入；瞒胸导致阳气不清，神志失守。嘴唇肿胀高耸先现者，说明脾土受伤；两颊两颐部痘疹稠密成片，或像涂了朱砂一样红赤，说明肝气过盛克制脾土，到了第八九日应当出现滑泄腹泻，且泻下青色粪便、不进食，这就形成了险恶的证候，所以这些部位都不宜痘疹过多。只有四肢，如同士卒兵卒地位卑贱，不足以轻重论，所以即使痘疹多也无妨。以上各种症状都需要解毒清热，疏通营卫表里，必须使血液流通、气息均匀，才可以避免干枯焦黑的变证。然而观察上部可以推知下部。如印堂之下对应心胸，鼻子下方对应背部，两额对应两腰，两颐对应两眼，额上部的稠密情况，就可以推知下部的情况了。
In the treatment of smallpox (Douzhen), observing the initial eruption sites allows one to predict the severity and prognosis. The left cheek corresponds to Liver Wood, the right cheek to Lung Metal, the center of the forehead to Heart Fire, the chin to Kidney Water, and the nose to Spleen Earth. The center of the forehead is the convergence point of the Taiyang (Greater Yang) meridians. The lips and cheeks are traversed by the Yangming (Bright Yang) meridians. The sides behind both ears are passed through by the Shaoyang (Lesser Yang) meridians. Smallpox is considered a Yang toxin; thus, it manifests on the face following Yang energy. However, the Stomach and Large Intestine, belonging to the Yangming channel, accumulate old matter and accept decay, possessing abundant Qi and Blood. Therefore, if eruptions appear first, fill with pus first, and scab over first in the areas beside the mouth and nose, above and below the Philtrum (Renzhong), and between the cheeks and the nasal bridge (Nianshou), this is auspicious. Conversely, if this occurs in the Taiyang region (where Water and Fire contend) or the Shaoyang region (the thoroughfare where Water and Fire merge), it is ominous. Furthermore, the head is the gathering place of all Yang meridians; the temporal regions of the cheeks are the reservoirs of the essence of the five Zang organs; the pharynx (Yan) is the pathway for food and drink; the larynx (Hou) is the passage for lung respiration; and the chest and abdomen are the regions where Yang Qi receives its nourishment and where the Heart and Lungs reside. In these locations, sparse eruptions are desirable. Excessive eruptions on the head and forehead are termed "Meng Tou" (Covering Head); excessive eruptions on the neck and nape are termed "Suo Xiang" (Locking Neck); and excessive eruptions on the chest are termed "Man Xiong" (Concealing Chest). Meng Tou leads to loss of vision and hearing, and cessation of Qi transformation. Suo Xiang prevents internal pathogens from exiting and external healthy Qi from entering. Man Xiang results in unclear Yang Qi and loss of Shen (Spirit) retention. Swelling and protrusion of the lips appearing early indicates injury to Spleen Earth. Dense, patchy eruptions on the cheeks and jawlines, resembling applied cinnabar, indicate Liver excess suppressing Spleen function. By the eighth or ninth day, this may lead to slippery diarrhea, passage of green stool, and anorexia, forming a critical condition. Thus, excessive eruptions in these areas are unfavorable. Only the limbs, being of humble status like soldiers, are of lesser importance; therefore, even numerous eruptions there are not harmful. For the aforementioned conditions, detoxification and clearing heat, along with unblocking Ying (Nutritive) and Wei (Defensive) energies and regulating the interior and exterior, are required. One must ensure free blood circulation and balanced Qi to avoid complications such as drying, scorching, and blackening. Observing the upper body allows inference about the lower body. For instance, the area below Yintang corresponds to the chest and heart; below the nose corresponds to the back; the two foreheads correspond to the two loins; and the two jawlines correspond to the eyes. The density on the forehead can thus reveal the condition below.