血箭出于心经火盛，逼血从毛窍出也；血痣由于肝经怒火郁结，其形初起色红如痣，渐大如豆，揩之血流。
治血箭以桃花散凉水调敷，或金墨涂搽自止。血痣须用冰蛳散枯去本痣，以珍珠散搽之，生皮乃愈。血甚者，
内服凉血地黄汤，兼戒口味始痊。
凉血地黄汤
凉血地黄汤黄连 当归甘草山栀全
加上玄参效更添 无辜出血即安然
治血箭、血痣，内热甚而逼血妄行，出血如飞者。
黄连 当归 生地 山栀 玄参 甘草（各等分）
水二钟，煎八分，量病上下服之。
桃花散（见跌扑门）
冰蛳散（见瘰 门）
珍珠散（见下疳门）
鹅掌风由手阳明、胃经火热血燥，外受寒凉所凝，致皮枯槁；又或时疮余毒未尽，亦能致此。初起红斑白
点，久则皮肤枯浓破裂不已，二矾汤熏洗即愈。
二矾汤
二矾汤中白皂矾 儿茶柏叶在其间
先熏后洗油烟照 鹅掌风顽愈不难
治鹅掌风皮肤枯浓、破裂作痛，宜用此汤熏洗，轻则不宜，越重越效。
白矾 皂矾（各四两） 孩儿茶（五钱） 柏叶（半斤）
用水十碗，同上药四味煎数滚候用。先用桐油搽抹患上，以桐油蘸纸拈点着，以烟焰向患上熏之；片时方
将前汤乘滚贮净桶内，手架上用布盖，以汤气熏之，勿令泄气，待微热倾入盆内，蘸洗良久，一次可愈。七日
忌下汤水，永不再发。
Blood Arrow (Xuejian) arises from excessive fire in the Heart Meridian, forcing blood to exit through the hair follicles; Blood Nevus (Xuemi) results from the stagnation of anger-fire in the Liver Meridian. Its initial appearance is red like a mole, gradually enlarging to the size of a bean, and bleeding occurs upon wiping.
To treat Blood Arrow, apply Taohua San (Peach Blossom Powder) mixed with cool water, or apply gold ink; the bleeding will stop spontaneously. For Blood Nevus, Bing Si San (Ice Snail Powder) must be used to cauterize and remove the lesion, followed by the application of Zhenzhu San (Pearl Powder); healing occurs when new skin grows. In severe cases, internal administration of Liangxue Dihuang Tang (Cooling Blood Rehmannia Decoction) is required, along with dietary restrictions on rich flavors for recovery.
Liangxue Dihuang Tang (Cooling Blood Rehmannia Decoction)
Liangxue Dihuang Tang consists of Huanglian (Coptis Rhizome), Danggui (Angelica Sinensis Root), Gancao (Licorice Root), and Shanzhi (Gardenia Fruit). Adding Xuanshen (Scrophularia Root) enhances efficacy, ensuring safety against spontaneous bleeding.
This formula treats Blood Arrow and Blood Nevus caused by intense internal heat forcing reckless blood flow, where bleeding is profuse.
Ingredients: Huanglian (Coptidis Rhizoma), Danggui (Angelicae Sinensis Radix), Shengdi (Rehmanniae Radix), Shanzhi (Gardeniae Fructus), Xuanshen (Scrophulariae Radix), Gancao (Glycyrrhizae Radix et Rhizoma) (equal parts).
Preparation: Use two bowls of water, decoct until reduced to 80%, and administer according to the location of the disease.
Taohua San (See Trauma Section)
Bing Si San (See Scrofula Section)
Zhenzhu San (See Chancre Section)
Eczema of the Palm (Ezhangfeng) is caused by heat-fire and dryness of blood in the Hand-Yangming Large Intestine Meridian and Stomach Meridian, combined with external cold condensation, leading to rough and dry skin; alternatively, residual toxins from infectious sores (such as syphilis) can also cause this condition. Initially presenting as red spots and white dots, it eventually leads to persistent dryness, suppuration, and cracking of the skin. Fumigation and washing with Er Fan Tang (Two Alum Decoction) leads to cure.
Er Fan Tang (Two Alum Decoction)
Er Fan Tang contains Bai Fan (Alumen) and Zao Fan (Ferrum Sulfate), along with Ercha (Catechu) and Baiye (Cupressi Cacumen). Fumigation first, then washing, utilizing smoke exposure makes stubborn Ezhangfeng easy to cure.
This decoction is suitable for fumigation and washing for Ezhangfeng characterized by dry, suppurative, cracked, and painful skin. It is not recommended for mild cases but becomes more effective as severity increases.
Ingredients: Bai Fan (Alumen), Zao Fan (Ferrum Sulfate) (4 liang each), Ercha (Catechu) (5 qian), Baiye (Cupressi Cacumen) (0.5 jin).
Preparation: Use ten bowls of water, boil the four ingredients together several times until boiling, and set aside. First, apply Tung oil (Verniciae Folium Oil) to the affected area. Dip paper twists in Tung oil, ignite them, and fumigate the lesion with the smoke. After a while, pour the hot decoction into a clean bucket. Place hands over the bucket, cover with cloth to trap the steam, and fumigate without letting gas escape. Once slightly warm, pour into a basin and wash/soak for an extended period; one treatment may suffice. Avoid contact with raw water for seven days to prevent recurrence permanently.