轻、发表和里、宣、通阳活血。
辛散而平。（隐居曰∶白冷青热、伤寒方中、不得用青。）发汗解肌。通上下阳气。（仲
景白
通汤、通脉四逆汤、并加之以通脉回阳、若面赤而格阳于上者、尤须用之。）治伤寒头痛。
时疾热狂。阴毒腹痛。（阴证厥逆、安脐上熨之。）香港脚奔豚。益目睛。（白睛属肺。）利耳鸣
。通二便。（时珍曰∶葱白吹盐入玉茎中、治小便不通、及转脬危急者、极效。）气通则血活
。（气为血帅。）故治吐血衄血。便血痢血。折伤出血。（火煨研封、止痛无瘢。）乳痈风痹。
通乳安胎。（合香豉阿胶、治胎动。）通气故能解毒。杀药毒、鱼肉毒、蚯蚓毒。涂 犬伤。
多食令人神昏发落。虚气上冲。取白连须用。同蜜食。杀人。（百一方、患外痔者、先用木
鳖煎汤熏洗、以青葱涎对蜜调敷、其凉如冰。）同枣食。令人病。合犬雉肉食。令人病血。
青叶、治水病足肿。（茎叶煮汤渍之、日三五次、妙。）汁、（金疮出血、取葱炙热、 汁涂
之。）
一名 子。滑、利窍泄滞。
辛苦温滑。下气调中。散血生肌。泄下焦大肠气滞。治泄痢下重。（好古曰∶下重者、
气滞
也、四逆散加此以泄滞、按里急后重、有气虚血虚、火热风燥之不同、宜随证施治、勿专执
一说。）胸痹刺痛。肺气喘急。（取其滑泄。）安胎和产。涂汤火伤。（和蜜捣。）滑利之品。
无滞勿用。补虚之说。切勿信之。叶似韭而中空。（其叶光滑、露亦难伫、故云薤露。）根如
蒜。取白用。
Nature is light, with the functions of releasing the exterior, harmonizing the interior, diffusing and unblocking Yang Qi, and invigorating blood.
Pungent in dispersion and neutral in temperature. (Tao Hongjing stated: Scallion white is cold, scallion green is hot; in formulas for Cold Damage, scallion green must not be used.) It induces sweating and releases the muscle layer. It unblocks Yang Qi throughout the upper and lower body. (In Zhang Zhongjing's Bai Tong Tang [White Unblocking Decoction] and Tong Mai Si Ni Tang [Unblock Pulse Four Reversal Decoction], scallion white is added to unblock the pulse and restore Yang; especially when there is facial redness due to floating Yang repelled upwards, it is particularly necessary to use it.) It treats headache caused by Cold Damage.
It treats fever and mania from epidemic diseases. Yin toxicity abdominal pain. (For Yin syndrome with cold extremities, place scallion white on the navel and apply heat.) It treats podagra (Hong Kong foot) and Ben Tun [Rushing Pig] qi. It benefits the eyes. (The white part of the eye belongs to the Lung.) It relieves tinnitus. It promotes urination and defecation. (Li Shizhen said: Blowing salt into a urethra-inserted scallion white is extremely effective for treating urinary retention and critical cases of bladder displacement.) When Qi flows freely, Blood moves actively. (Qi is the commander of Blood.) Therefore, it treats hematemesis [vomiting blood], epistaxis [nosebleed], hematochezia [blood in stool], bloody dysentery, and bleeding from traumatic injuries. (Roasted over fire, ground, and applied externally, it stops pain without leaving scars.) It treats breast abscess [Ru Yong] and wind-bi [wind-damp obstruction]. It promotes lactation and calms the fetus. (Combined with Fermented Soybean Paste [Xiang Chi] and Donkey-hide Gelatin [E Jiao], it treats restless fetus.) Because it promotes Qi flow, it can detoxify. It neutralizes drug poison, fish/meat poison, and earthworm poison. Applied topically, it treats dog bites.
Excessive consumption causes mental confusion and hair loss. It triggers upward rushing of deficient Qi. Use the white part, preferably with the roots. Consuming it with honey can be fatal. (The *Bai Yi Fang* records: For patients with external hemorrhoids, first fumigate and wash with a decoction of Momordica charantia seed [Mu Bie Zi], then apply a paste made of scallion juice mixed with honey, which feels as cool as ice.] Consuming it with dates causes illness. Consuming it with dog meat or pheasant meat causes blood disorders.
Scallion green leaves treat edema with swollen feet. (Boil stems and leaves to make a decoction for soaking, three to five times daily, which is excellent.) Juice: (For traumatic wounds with bleeding, take scallion, heat it, and apply the juice.)
Xie [Allium macrostemon / Chinese Leek]. Nature is slippery, promoting orifices and draining stagnation.
Pungent and bitter, warm and slippery. It directs Qi downward and harmonizes the Middle Jiao. It disperses blood and generates flesh. It drains Qi stagnation in the Lower Jiao and Large Intestine. It treats dysentery with tenesmus. (Li Haogou said: Tenesmus is due to Qi stagnation; adding Xie to Si Ni San [Four Reversal Powder] drains the stagnation. Note that tenesmus varies according to Qi deficiency, Blood deficiency, Fire-Heat, or Wind-Dryness; treatment should follow the pattern differentiation, do not adhere rigidly to one theory.) It treats chest bi [obstruction] with stabbing pain and asthma/wheezing due to Lung Qi rebellion. (Utilizing its slippery and draining nature.) It calms the fetus and facilitates childbirth. Applied topically, it treats burns and scalds. (Mashed with honey.) As a slippery and lubricating substance, it should not be used when there is no stagnation. Do not believe claims regarding its tonifying deficiency properties. The leaves resemble chives but are hollow. (The leaves are smooth, making it difficult for dew to stay, hence the term "Xie Lu" [Leek Dew].) The root resembles garlic. Use the white part.