凡艾炷须令脚根足三分，若不足三分，恐覆孔穴不备，穴中经脉火气不行，即不能抽邪
气引
端午日，日未出，于艾中以意求其似人者，辄指之以灸，殊有效功，时见一书中云尔忘
其何书也。艾未有真似人者，于明暗间苟以意命之，万法皆妄，无一真者，此何疑耶？
黄帝曰∶松柏柿桑枣榆柳竹等木火，用灸必害肌血，慎不可用。凡取火者，宜敲石取火，
或
风寒湿三气杂至，合而为痹。皆因体虚腠理空疏，受风寒湿气而成痹也。痹之为病，寒
多则痛；风多则行；湿多则着。在骨则重而不举；在脉则血凝而不流；在筋则屈而不伸；在
肉则不仁；在脾则逢寒急，逢热则纵，此皆随所受邪气而生证也。大率痹病，总而言之，凡
有五种∶筋痹、脉痹、皮痹、骨痹、肌痹是也。筋痹之为病，应乎肝，其状夜卧则惊，饮食
多，小便数；脉痹之为病，应乎心，其状血脉不流，令人痿黄，心下鼓气，卒然逆喘不通，
嗌干善噫；肌痹之为病，应乎脾，其状四肢懈怠，发咳呕吐；皮痹之为病，应乎肺，其状皮
肤无所知觉，气奔喘满；骨痹之为病，应乎肾，其状骨重不可举，不遂而痛且胀。诊其脉大
而涩为痹，脉来急者亦为痹，脉涩而紧者亦为痹。又有风血痹，阴邪入于血经故也。外有支
饮亦令人痹，当随证施治。
When preparing moxa cones, the base and root must be at least three *fen* (approx. 1 cm) thick. If less than three *fen*, it may fail to adequately cover the acupoint, preventing the fire qi from circulating within the meridians of the point, thereby failing to draw out pathogenic factors.
On the day of the Dragon Boat Festival, before sunrise, one should use their mind's eye to seek moxa segments resembling human forms; immediately using them for moxibustion yields remarkable efficacy. I recall seeing this mentioned in a certain book, though I have forgotten which one. In truth, moxa does not truly resemble humans. If one forces a resemblance based on imagination amidst ambiguity, all such methods are delusional, with none being true. What doubt remains?
The Yellow Emperor said: Using wood from pine, cypress, persimmon, mulberry, jujube, elm, willow, or bamboo as fuel for moxibustion will inevitably damage the muscles and blood; they must strictly be avoided. When obtaining fire, it is appropriate to strike flint to create sparks, or... [text ends]
Wind, cold, and dampness, when mixed and invading together, combine to form Bi syndrome (obstruction syndrome). This arises because the body is deficient and the interstices (*couli*) are loose, allowing wind, cold, and dampness to invade and cause Bi. In Bi disease, an excess of cold leads to pain; an excess of wind leads to wandering pain; an excess of dampness leads to fixed pain. If located in the bones, the limbs feel heavy and difficult to lift; if in the vessels, blood coagulates and fails to flow; if in the sinews, flexion occurs but extension is impossible; if in the flesh, there is numbness and insensitivity; if in the spleen, cold causes stiffness/tightness while heat causes flaccidity. These manifestations arise according to the specific pathogenic factor received. Generally speaking, Bi diseases can be summarized into five types: Jin Bi (Sinew Bi), Mai Bi (Vessel Bi), Pi Bi (Skin Bi), Gu Bi (Bone Bi), and Ji Bi (Muscle Bi).
Jin Bi corresponds to the Liver. Its symptoms include startle during sleep, increased appetite, and frequent urination. Mai Bi corresponds to the Heart. Its symptoms include stagnant blood flow, sallow complexion, palpitations or a sensation of Qi beating below the heart, sudden dyspnea and obstruction, dry throat, and frequent belching. Ji Bi corresponds to the Spleen. Its symptoms include flaccidity and lassitude of the four limbs, accompanied by coughing and vomiting. Pi Bi corresponds to the Lung. Its symptoms include loss of sensation in the skin, and Qi rushing upward causing wheezing and chest fullness. Gu Bi corresponds to the Kidney. Its symptoms include heaviness of the bones making them difficult to lift, paralysis or lack of coordination, along with pain and distension.
Palpation reveals that a large and choppy pulse indicates Bi; a rapid pulse also indicates Bi; a choppy and tight pulse also indicates Bi. There is also Feng Xue Bi (Wind-Blood Bi), caused by Yin pathogens entering the Blood meridians. Additionally, Zhi Yin (branching fluid retention) can also cause Bi-like symptoms; treatment should be administered according to the specific pattern.