发热，汗出，恶风，脉缓者，名曰中风。恶寒，体疼，呕逆，脉寸尺俱紧者，名曰伤
寒。此风寒脉证之提纲也，分言之六经，各有专证，各有异脉。太阳受病，寸尺俱浮。阳
明受病，寸尺俱长。少阳受病，寸尺俱弦。太阴受病，寸尺俱细。少阴受病，寸尺俱弱。厥
阴受病，寸尺俱微而缓，故曰脉异。太阳汗不出名伤寒，汗自出名中风。阳明能食为中
风，不能食为伤寒。少阳耳聋，目赤，胸满，心烦，为中风；头痛，发热，而脉弦细，为
伤寒。太阴中风，手足自温，伤寒自利，不渴。少阴中风，自利而渴，伤寒欲吐欲寐。厥
阴中风，舌卷囊缩，伤寒饥不欲食。故曰证专在三阳，脉则浮，三阴脉则沉，其缓紧迟
细则一。若浮不缓，不紧，而滑数，沉不细，不迟，而濡急，则即风温与湿温之脉。再审
其证，庶无错误。至于阳证见阴脉，阴证见阳脉，舍从两难，乃系疫证，与寒温异治矣。
寒本阴邪，何以伤寒证中又有中风？温乃阳邪，何以温证之中，又有湿温？要知阴
中有阳，阳中有阴。寒证中伤寒是主，中风是宾。温证中风温是主，湿温是宾。湿温与
伤寒相对待，风温与中风相对待。而疫则有寒有温，温疫是其常，寒疫是其变。知常知
变，知对待，知宾主，可与言阴阳互根之理矣！彼囿于一偏者，不肆用寒凉，即概用温
补。曾亦思偏寒偏热之证，不多见耶。
发热，汗出，怕风，脉象缓弱的，称为中风。恶寒，身体疼痛，呕吐逆气，寸部和尺部脉象都紧的，称为伤寒。这是风寒病脉证的提纲。分别论述六经，各有特定的证候，各有不同的脉象。太阳经受邪，寸部和尺部脉象都浮。阳明经受邪，寸部和尺部脉象都长。少阳经受邪，寸部和尺部脉象都弦。太阴经受邪，寸部和尺部脉象都细。少阴经受邪，寸部和尺部脉象都弱。厥阴经受邪，寸部和尺部脉象都微而缓，所以叫脉异。太阳经受邪无汗的叫伤寒，自汗出的叫中风。阳明经受邪能进食的叫中风，不能进食的叫伤寒。少阳经受邪出现耳聋，眼睛红赤，胸中满闷，心烦，属于中风；头痛，发热，脉象弦细，属于伤寒。太阴经受邪中风，手足自然温暖；伤寒则下利，口不渴。少阴经受邪中风，下利且口渴；伤寒则想吐又想睡觉。厥阴经受邪中风，舌头卷缩、睾丸收缩；伤寒则饥饿但不想吃东西。所以说证候在三阳经是专一的，脉象表现为浮；三阴经脉象表现为沉，至于缓、紧、迟、细则是共同的特征。如果脉浮但不缓、不紧，而是滑数；脉沉但不细、不迟，而是濡急，那就是风温与湿温的脉象。再仔细审查其证候，才没有错误。至于阳证出现阴脉，阴证出现阳脉，难以取舍从舍，这属于疫病，治疗方法与寒温病不同。寒本是阴邪，为什么在伤寒证中又有中风？温本是阳邪，为什么在温证之中又有湿温？要知道阴中有阳，阳中有阴。寒证中伤寒是主证，中风是兼证。温证中风温是主证，湿温是兼证。湿温与伤寒相对待，风温与中风相对待。而疫病则有寒有温，温疫是常态，寒疫是变局。知道常态和变局，知道相对待的关系，知道主证和兼证，就可以谈论阴阳互根的道理了！那些局限于片面观点的人，不是肆意使用寒凉药，就是一概使用温补药。他们难道没想过偏寒偏热的证候是不多见的吗？
Fever, sweating, aversion to wind, and a moderate pulse are named Wind Strike (Zhong Feng). Aversion to cold, body pain, vomiting or regurgitation, and tight pulses at both the Cun (inch) and Chi (cubit) positions are named Cold Damage (Shang Han). This is the outline of the pulse and symptoms for Wind and Cold pathogens. When discussed separately according to the Six Meridians (Liu Jing), each has specific syndromes and distinct pulses. When the Taiyang meridian (Bladder and Small Intestine) is affected, the pulses at both Cun and Chi positions are floating. When the Yangming meridian (Stomach and Large Intestine) is affected, the pulses are long. When the Shaoyang meridian (Gallbladder and Sanjiao) is affected, the pulses are wiry. When the Taiyin meridian (Spleen and Lung) is affected, the pulses are fine. When the Shaoyin meridian (Heart and Kidney) is affected, the pulses are weak. When the Jueyin meridian (Liver and Pericardium) is affected, the pulses are faint and moderate; hence it is said that the pulses differ. In Taiyang disease, absence of sweat is named Cold Damage, while spontaneous sweating is named Wind Strike. In Yangming disease, the ability to eat indicates Wind Strike, while inability to eat indicates Cold Damage. In Shaoyang disease, deafness, red eyes, chest fullness, and irritability indicate Wind Strike; whereas headache, fever, and wiry-thin pulses indicate Cold Damage. In Taiyin Wind Strike, the hands and feet are naturally warm; in Taiyin Cold Damage, there is spontaneous diarrhea without thirst. In Shaoyin Wind Strike, there is diarrhea with thirst; in Shaoyin Cold Damage, there is a desire to vomit and sleepiness. In Jueyin Wind Strike, there is tongue curling and testicular retraction; in Jueyin Cold Damage, there is hunger but no desire to eat. Therefore, it is said that the syndromes in the Three Yang meridians are specific, with floating pulses; the pulses in the Three Yin meridians are sunken, while moderate, tight, slow, and fine characteristics are common. If the pulse is floating but not moderate or tight, instead being slippery and rapid; or if it is sunken but not fine or slow, instead being soggy and urgent, these are the pulses of Wind-Warmth (Feng Wen) and Damp-Warmth (Shi Wen). By carefully examining the symptoms, errors can be avoided. As for Yang syndromes presenting Yin pulses, or Yin syndromes presenting Yang pulses, where the decision to follow the syndrome or the pulse is difficult, this belongs to Epidemic Diseases (Yi Zheng), which require different treatments from Cold and Warm diseases. Cold is originally a Yin pathogen; why is there Wind Strike within Cold Damage syndromes? Warmth is originally a Yang pathogen; why is there Damp-Warmth within Warmth syndromes? One must understand that Yin contains Yang, and Yang contains Yin. In Cold syndromes, Cold Damage is the primary aspect, and Wind Strike is the secondary aspect. In Warmth syndromes, Wind-Warmth is primary, and Damp-Warmth is secondary. Damp-Warmth corresponds to Cold Damage, and Wind-Warmth corresponds to Wind Strike. Epidemic diseases involve both Cold and Warmth; Warm-Epidemics are their normal state, while Cold-Epidemics are their variations. To know the normal and the variable, to understand correspondence, and to distinguish between primary and secondary aspects, one can discuss the principle of the mutual root of Yin and Yang! Those confined to partial views either recklessly use Cold-Cooling herbs or indiscriminately use Warm-Nourishing methods. Have they ever considered that syndromes of extreme Cold or extreme Heat are not common?