三关在第二指侧看第三节
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紫热红伤寒，青惊白色疳，黑时因中恶，黄即困脾端。
又
青色大小曲，人惊并四足；赤色大小曲，水火飞禽蹼；紫色大小曲，伤米面鱼肉；黑色大小曲，脾风微作搐。
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鱼刺惊风证莫疑，气关疳病热相随，命关见此为难治，此是肝家转到脾。
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初节悬针泻痢生，气关肺热更疳凝，三关直透黄泉近，此候须知是慢惊。
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水字生惊肺受风，气关咳嗽积痰攻，医人仔细详虚实，出命惊疳夹证凶。
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乙定惊风肝肺随，气关形见发无时，此形若直命关上，不久相将作慢脾。
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曲虫为候主生疳，若见气关积秽肝，直到命关为不治，须知心脏已传肝。
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双环肝脏受疳深，入胃气关吐逆临，若是命关为死候，枉教医者更劳心。
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流珠形见死来侵，面上如斯也不生，纵有神丹人不救，医人仔细更叮咛。
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伤寒斜向右。
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伤食七堪俦。
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双钓伤冷定。
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逢惊山字浮。
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丝纹将发搐。
丰字引堪愁。
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若遇伤风证，脉斜向左朝。
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形如新月样，向右气疳留。
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若是弯居左，风疳药可投。
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形如三叠曲，伤硬物为仇。
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更有环生脚。
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尤嫌上下钩，皆为伤冷候，医者用心求，疳极如劳状，乱虫皆可忧。
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交了纹互叠，腹面见因由。
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更有青筋贯，百中无一瘳。
三关位于食指第二节的侧面观察第三节。
虎口三关脉纹图 [图片]
紫色主热，红色主伤寒，青色主惊风，白色主疳积，黑色主中恶，黄色主脾虚困顿。
又歌诀：
青色且呈大小弯曲状，主因被人惊吓或接触四足动物；
赤色且呈大小弯曲状，主因水火之邪或接触飞禽蹼类；
紫色且呈大小弯曲状，主因饮食米面鱼肉损伤；
黑色且呈大小弯曲状，主因脾风微动引发抽搐。
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若见鱼刺引起的惊风证候，不必迟疑；
若脉纹现于气关，多为疳病伴发热；
若脉纹现于命关，则难以治疗，这是肝家病邪传变至脾的表现。
[图片]
初节（风关）出现悬针纹，预示将发生泻痢；
气关出现肺热兼有疳积凝结；
若脉纹直透三关至指端（黄泉），此候须知是慢惊风。
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脉纹呈“水”字形，主生惊风且肺受风邪；
气关出现咳嗽，由积痰攻冲所致；
医生需仔细辨别虚实，若脉纹出至命关，则为惊风与疳积夹杂的凶险证候。
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脉纹呈“乙”字形，定主惊风，涉及肝肺二脏；
气关出现此形，发作无定时；
若此形直透至命关，不久将转为慢脾风。
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脉纹呈“曲虫”形状，主生疳积；
若见于气关，为积滞秽浊在肝；
若直至命关，属不治之症，须知心脏病邪已传至肝。
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脉纹呈双环状，肝脏受疳积深重；
若入胃经现于气关，将出现呕吐逆乱；
若现于命关，则为死候，徒劳医者之心。
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脉纹呈流珠形，预示死亡临近；
面色如此者亦难存活；
纵有神丹妙药也无法救治，医生需仔细并反复叮咛家属。
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伤寒证，脉纹斜向右方。
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伤食证，脉纹形态如“七”字可类比。
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双钩形，主伤冷证，确凿无疑。
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逢惊风证，脉纹呈山字形且浮起。
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丝纹出现，即将发生抽搐。
丰字形出现，引人堪忧愁苦。
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若遇伤风证，脉纹斜向左方。
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脉纹形如新月样，向右方者，为气疳停留。
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若是弯居左方，风疳可用药物投治。
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脉纹形如三叠曲，主因误食坚硬物体所致。
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更有环生脚状脉纹。
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尤其嫌弃上下钩状脉纹，皆为伤冷证候，医者需用心探求。
疳积极甚如同劳损之状，体内乱虫皆令人担忧。
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脉纹交错互叠，腹部症状显现其缘由。
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更有青筋贯穿，百人中无一能痊愈。
The Three Passages (San Guan) are observed on the lateral side of the third segment of the second finger.
Diagram of Pulse Patterns at the Tiger's Mouth Three Passages [Image]
Purple indicates Heat; Red indicates Cold Damage (Shang Han); Green/Cyan indicates Fright (Jing); White indicates Infantile Malnutrition (Gan); Black indicates Evil Invasion (Zhong E); Yellow indicates Spleen Deficiency and Distress.
Another verse:
Green/Cyan with large or small curves indicates fright from humans or contact with quadrupeds;
Red with large or small curves indicates pathogenic factors of water and fire or contact with avian webbed feet;
Purple with large or small curves indicates injury from consuming rice, flour, fish, or meat;
Black with large or small curves indicates slight spasms due to Spleen Wind.
[Image]
If the pattern resembles a fish bone indicating Fright-Wind syndrome, do not doubt;
If seen at the Qi Passage (middle segment), it is accompanied by fever from Infantile Malnutrition;
If seen at the Ming Guan (distal segment), it is difficult to treat; this represents the Liver pathogen transmitting to the Spleen.
[Image]
At the initial segment (Wind Passage), a hanging needle pattern indicates impending diarrhea and dysentery;
At the Qi Passage, Lung Heat combined with condensed Infantile Malnutrition appears;
If the pulse pattern penetrates straight through all three segments towards the end of the finger (Yellow Spring), this condition must be known as Slow Convulsion (Man Jing).
[Image]
A "Water" character pattern indicates Fright-Wind with Lung affected by Wind;
At the Qi Passage, coughing caused by accumulated phlegm attacking occurs;
Physicians must carefully examine deficiency and excess; if the pattern extends to the Ming Guan, it is a fierce syndrome of mixed Fright-Wind and Infantile Malnutrition.
[Image]
An "Yi" (乙) character pattern definitively indicates Fright-Wind involving the Liver and Lung;
When this shape appears at the Qi Passage, attacks occur without fixed timing;
If this shape penetrates straight to the Ming Guan, it will soon transform into Slow Spleen Wind (Man Pi Feng).
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A "Curved Worm" pattern primarily indicates the generation of Infantile Malnutrition;
If seen at the Qi Passage, it indicates accumulation of filth in the Liver;
If it reaches the Ming Guan, it is incurable; one must know that Heart pathogen has transmitted to the Liver.
[Image]
Double-ring patterns indicate deep Liver involvement from severe Infantile Malnutrition;
Entering the Stomach meridian at the Qi Passage leads to vomiting and regurgitation;
If present at the Ming Guan, it is a death omen, rendering the physician's efforts futile.
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The appearance of a "Flowing Pearl" pattern signals approaching death;
Such facial complexion also indicates non-survival;
Even with divine elixirs, the patient cannot be saved; physicians must carefully and repeatedly instruct the family.
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In Cold Damage syndromes, the pulse pattern slants to the right.
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In food retention syndromes, the pattern resembles the character "Seven".
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Double-hook patterns definitively indicate cold injury.
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Upon encountering fright, the mountain-shaped pattern floats.
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Thread-like patterns indicate imminent spasms.
The "Feng" (丰) character pattern induces sorrow and worry.
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In wind-cold damage syndromes, the pulse pattern slants to the left.
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Patterns resembling a new moon curving to the right indicate Qi-type Infantile Malnutrition stagnation.
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If curved to the left, medicinal treatment for Wind-Infantile Malnutrition can be administered.
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Patterns resembling triple-layered curves indicate injury from hard objects.
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There are also ring-like patterns with legs.
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Especially undesirable are upper and lower hook patterns; all indicate cold injury syndromes, which physicians must seek diligently.
Severe Infantile Malnutrition resembling consumptive disease, with chaotic intestinal parasites, causes great concern.
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Intersecting and overlapping patterns reveal abdominal symptoms and their causes.
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Furthermore, penetrating blue-green veins indicate that among hundreds, none will recover.