下经云、古来灸病。忌松柏枳橘榆枣桑竹八木。切宜避之。有火珠曜日。以艾承之得火
。次有火镜耀日。亦以艾引得火。此火皆良。诸蕃部落用镔铁击KT 石得火出。以艾引之。凡人卒
难备。即不如无木火。清麻油点灯。灯上烧艾茎点灸是也。兼滋润灸疮。至愈不疼痛。用蜡
良方云、凡取火者。宜敲石取火。（今舟行人以铁钝刀击石穴。以纸灰为火丸。在下承
之。亦得火。）或水精镜于日得太阳火为妙。天阴则以槐木取火。
下经云、凡着艾得疮发。所患即瘥。不得疮发。其疾不愈。甲乙经云、灸疮不发者。用
故履底灸令热。熨之。三日即发。今用赤皮葱三五茎去青。于 火中煨熟。拍破。热熨疮十余遍
。其疮三日自发。予见人灸不发者。频用生麻油渍之而发。亦有用皂角煎汤。候冷、频点之
而发。亦有恐气血衰不发。于灸前后煎四物汤服。以此汤滋养气血故也。盖不可一概论也。
予尝灸三里各七壮。数日过不发。再各灸两壮。右足发。左足不发。更灸左足一壮。遂发两
月。亦在人以知取之。若任其自然。则终不发矣。此人事所以当尽也。
凡着灸住火。便用赤皮葱薄荷煎汤。温洗疮周回约一二尺。令驱逐风气于疮口出。兼令
往来不滞。自然疮坏疾愈。（今人亦有恐水杀人。不用汤淋。）若灸疮退火痂后。用东南桃枝
青嫩柳皮煎汤温洗。能护疮中诸风。若疮内黑烂。加胡荽煎。若疮疼不可忍。多时不较。加黄连煎神效。
凡贴灸疮。春用柳絮。夏用竹膜。秋用新棉。冬用兔腹上白细毛。猫儿腹毛更佳。今人多以
膏药贴之。日三两易。全不疼。但以膏药贴。则易干尔。若要脓出多而疾除。不贴膏药尤佳。
《下经》记载：自古以来，施灸治疗疾病时，忌讳使用松柏、枳树、橘子、榆树、枣树、桑树、竹子这八种树木的木材。务必避开这些木材。如果有火珠在阳光下聚焦取火，将艾草置于其下即可引燃；其次有用火镜反射日光，也能用艾草引燃取火。这些火源都是良好的。各少数民族部落用镔铁敲击碙石（一种含磷矿石）产生火花，再用艾草引燃。普通人很难随时准备这些工具，所以不如不用木柴生火，而是用纯净的麻油点灯，在灯上燃烧艾茎进行艾灸。这样既能滋润灸疮，直到痊愈也不会疼痛。
《用蜡良方》记载：凡是取火的方法，宜敲击石头取火。（现在乘船的人用钝铁刀敲击石穴，用纸灰做成火丸放在下面承接，也能得到火。）或者用水晶镜对着太阳取得太阳之火最为奇妙。天气阴晦时则用槐木取火。
《下经》记载：凡是施灸后起了灸疮，所患的疾病就会痊愈；如果不起灸疮，疾病就不会好。《甲乙经》记载：灸疮不发者，用旧的鞋底烧烫，熨贴患处，三天后灸疮就会发出。现在用赤皮葱三到五根，去掉青皮，在火中煨熟，拍破，趁热熨烫灸疮十余次，灸疮三天后自然发出。我见过有人灸后疮不发，频繁用生麻油浸泡患处而发出。也有用皂角煎汤，待冷却后频繁点涂而发出的。也有人担心气血衰弱导致灸疮不发，在灸前灸后服用四物汤，因为这个汤能滋养气血的缘故。大概不能一概而论。我曾经灸双侧足三里穴各七壮，过了几天还没发，又各加灸两壮，右脚发出了，左脚没发，再给左脚加灸一壮，于是两天都发了。这也在于人灵活运用去应对。如果听任其自然发展，那么最终也不会发。这是人事应当尽力做到的。
凡是施灸停止后，便用赤皮葱和薄荷煎汤，温洗疮口周围约一二尺的范围，让风气从疮口排出，同时让气血往来通畅不滞，自然疮面溃烂而疾病痊愈。（现在有些人害怕水会杀人，不用汤水淋洗。）如果灸疮退去火痂后，用东南方向的桃枝和青嫩的柳皮煎汤温洗，能保护疮中免受风邪侵害。如果疮内黑烂，加入胡荽（香菜）煎煮。如果疮痛难忍，长时间不好，加入黄连煎煮，效果神奇。
凡是敷贴灸疮，春天用柳絮，夏天用竹膜，秋天用新棉花，冬天用兔子腹部的白色细毛，猫儿腹部的毛更好。现在的人多用膏药贴敷，每天换两三次，完全不疼。但如果只用膏药贴敷，疮口容易干燥。如果想要脓液流出多从而病除，不贴膏药尤其好。
The *Xia Jing* (Classic of Lower Antiquity) records: Since ancient times, when treating diseases with moxibustion, it is taboo to use the wood of eight types of trees: pine, cypress, zhi tree, orange, elm, jujube, mulberry, and bamboo. One must strictly avoid these woods. If there is a fire pearl focusing sunlight, mugwort placed beneath it can be ignited; alternatively, a fire mirror reflecting sunlight can also ignite mugwort. These sources of fire are all excellent. Various ethnic tribes strike Bangteng iron against Kong stone (a phosphorus-containing ore) to produce sparks, which are then used to ignite mugwort. Ordinary people find it difficult to prepare such tools at all times, so it is better not to use wood fires. Instead, one may light a lamp with pure sesame oil and burn the stem of mugwort on the lamp for moxibustion. This method moistens the moxa sore, ensuring no pain until healing is complete.
The *Yong La Liang Fang* (Good Prescription for Using Wax) records: For obtaining fire, it is advisable to strike stones to create fire. (Currently, boatmen strike a hole in a stone with a blunt iron knife and place paper ash pellets below to catch the spark, thereby obtaining fire.) Or, using a crystal lens to focus sunlight to obtain solar fire is optimal. On cloudy days, locust wood is used to obtain fire.
The *Xia Jing* records: Whenever moxibustion induces a sore, the afflicted disease will heal; if no sore develops, the disease will not resolve. The *Jia Yi Jing* (Classics of Jia Yi) records: For moxa sores that do not develop, apply a hot old shoe sole to the area by ironing it; the sore will emerge within three days. Currently, take three to five stalks of red-skin green onion, remove the green skin, roast them in fire until cooked, crush them, and apply them hot to the moxa sore for more than ten repetitions. The sore will naturally emerge within three days. I have seen cases where moxa sores did not develop despite treatment; frequent application of raw sesame oil to the area induced emergence. Others used decoction of Gleditsia sinensis (Tiao Ji Dao), cooled, and applied frequently to induce emergence. Some feared deficiency of qi and blood preventing sore development, so they administered Si Wu Tang (Four Substances Decoction) before and after moxibustion, as this decoction nourishes qi and blood. Generally, one cannot apply a uniform rule. I once moxicated both Zusanli (ST36) acupoints seven moxa cones each. After several days, no sore had developed, so I added two cones to each. The right foot developed a sore, but the left did not. I added one cone to the left foot, and both developed within two days. This depends on human adaptability and intervention. If left to nature, it would never develop. This is what human effort should strive to achieve.
After stopping moxibustion, one should immediately wash the area around the sore (approximately one or two chi) with a warm decoction of red-skin green onion and mint, to expel wind pathogens from the sore opening and ensure smooth circulation without stagnation, leading to natural ulceration and healing. (Some modern people fear water causes death and avoid washing with decoctions.) After the moxa sore crust falls off, wash with a warm decoction of peach branches from the southeast and tender willow bark to protect the sore from wind pathogens. If the sore becomes black and rotten inside, add Coriandrum sativum (Cilantro) to the decoction. If the pain is unbearable and persists for a long time, add Coptis chinensis (Huanglian) to the decoction for miraculous effect.
For dressing moxa sores: use willow catkins in spring, bamboo membrane in summer, new cotton in autumn, and white fine hair from rabbit bellies in winter; cat belly hair is even better. Nowadays, most people use medicated plasters, changing them two to three times daily, resulting in no pain. However, using only plasters tends to dry out the sore. To promote abundant pus discharge for disease resolution, it is especially better not to use plasters.