偏头痛者，由风邪客于阳经，其经偏虚者，邪气凑于一边，痛连额角，久而不已，故谓
之偏头痛也。
王荆公患偏头痛，裕陵传禁中秘方，用生莱菔汁一蚬壳，仰卧注鼻中，左痛注右，右痛
注左，或两鼻皆注亦可，数十年患，皆一注而愈。
一妇人患偏头痛，一边鼻塞不闻香臭，常流清涕，或作臭气一阵，遍治头痛药皆不效。
一医教服芎犀丸，不十数服，忽然嚏突出一铤稠脓，其疾遂愈。
芎犀丸 此方兼祛风清热之长，而得参、胶等安定气血，虽虚人亦可用之。安内
攘外，并行不悖也。
川芎 朱砂（水飞，内一两为衣） 石膏 龙脑（各四两） 人参 茯苓 炙草 细辛（各
二两） 生犀角 栀子（各一两） 阿胶（炒，一两半） 麦冬（三两，去心）
上为细末，蜜丸弹子大，每服一丸，食后细嚼，茶酒任下。
节斋云∶久病头风，略感风寒，便发寒热，头须重绵浓帕包裹者，此属本热而标寒，世
人不
识，悉用辛温散之。轻时得效，误认为寒，殊不知其本有郁热，毛窍常疏，故风易入，外寒
束其内热，闭逆而为痛。辛热之药，虽能开通闭逆，散其表之寒邪，然以热济热，病本益深
，恶寒愈甚矣。惟当泻火凉血，而佐以辛温散表之剂，以从法治之，则病可愈而根可除也。
Pian Tou Tong (Hemicrania) arises when Wind pathogenic factors invade the Yang meridians. When a specific meridian is relatively deficient, the pathogenic factors gather on one side, causing pain that radiates to the frontal angle of the head. If this condition persists for a long time without resolution, it is termed Pian Tou Tong (Hemicrania).
Wang Jinggong (Wang Anshi) suffered from Pian Tou Tong (Hemicrania). Emperor Shenzong of Song transmitted a secret prescription from the imperial palace: take fresh Radish Juice (Lai Fu Zhi) in the quantity of one shell of a clam. The patient lies supine, and the juice is instilled into the nasal cavity. If the pain is on the left, instill into the right nostril; if on the right, instill into the left nostril; or both nostrils may be instilled simultaneously. A chronic condition lasting decades could often be cured with a single application.
A woman suffered from Pian Tou Tong (Hemicrania), with nasal congestion on one side, loss of smell, frequent discharge of clear mucus, and occasional bursts of foul odor. Treatments for headache proved ineffective.
A physician instructed her to take Xiong Xi Wan (Platycodon and Rhinoceros Horn Pill). After less than ten doses, she suddenly sneezed out a strip of thick pus, and her illness was subsequently cured.
Xiong Xi Wan (Platycodon and Rhinoceros Horn Pill): This formula excels in dispelling Wind and clearing Heat. It also incorporates Ren Shen (Ginseng Root) and E Jiao (Donkey-hide Gelatin) to stabilize Qi and Blood, making it suitable even for patients with deficiency. It secures the interior while expelling pathogens externally, allowing both actions to proceed without contradiction.
Chuan Xiong (Ligusticum Chuanxiong Rhizome); Zhu Sha (Cinnabar, processed by water flotation, used as an inner coating, 1 liang); Shi Gao (Gypsum Fibrosum); Long Nao (Borneol) (each 4 liang); Ren Shen (Ginseng Root); Fu Ling (Poria); Zhi Gan Cao (Prepared Licorice Root); Xi Xin (Asari Root) (each 2 liang); Sheng Xi Jiao (Rhinoceros Horn, raw); Zhi Zi (Gardenia Fruit) (each 1 liang); E Jiao (Donkey-hide Gelatin, stir-fried, 1.5 liang); Mai Dong (Ophiopogon Tuber) (3 liang, heart removed).
Grind all ingredients into a fine powder. Mix with honey to form pills the size of quince seeds. Take one pill per dose, chew thoroughly after meals, and swallow with tea or wine as preferred.
Jie Zhai stated: For chronic Tou Feng (Head Wind), where slight exposure to Wind-Cold triggers chills and fever, and the head requires wrapping in thick cotton and multiple scarves for relief, this pattern belongs to "Root Heat and Branch Cold." People of the world do not recognize this and uniformly use Acrid-Warm dispersing methods. When the condition is mild, it seems effective, leading to the mistaken belief that it is a Cold pattern. However, the root involves stagnant Heat, and the pores are often loose, allowing Wind to enter easily. External Cold binds the internal Heat, causing obstruction and rebellious Qi flow, resulting in pain. Acrid-Warm herbs can open obstructions and disperse external Cold, but using Warmth to assist Heat deepens the root pathology and exacerbates aversion to cold. One should instead purge Fire and cool Blood, assisted by Acrid-Warm exterior-releasing agents, treating according to the correct principle. Then the disease can be cured, and its root eradicated.