《病源论》云∶蚍蜉 者，因寒，腹中胪胀，所得寒毒不去，变化所生也。始发之时，
在其颈项，使人壮热若伤寒，有似疥癣，娄娄孔出，其根在肺。
《刘涓子方》治蚍蜉 ，始发于颈，初得如伤寒。此因食中有蚍蜉毒不去。
桃白皮（一分） 白术（四分） 知母（一分） 雌黄（一分） 干地黄（一分）
皮（四分） 独活（一分） 椒（一百枚） 青黛（一分） 斑蝥（一分） 白芷（一分） 柏
脂（一分） 夕药（一分） 海苔（一分） 当归（一分）
上十五物，合捣作散，下筛，服一钱匕，日三。病在里空腹服，在外先食后服之。又方∶
无斑蝥、术。
《病源论》云∶蛴螬 者，恐惧愁忧思虑，哭泣不止，余毒变化所生也。始发之时，在
其颈项，无头尾，如枣核，或移动皮中，使人寒热心满，其根在心。
《刘涓子方》云∶治蛴螬 ，始发颈，无头尾，如枣核块，块多在皮中，使人寒热心满。
此因喜怒哭泣。
空青（二分） 当归（二分） 细辛（一两） 干 肉〔一分（一方用皮）〕 枸杞根
（一分） 斑蝥（一分，去翅） 地胆（一分） 干鸟脑（如三大豆）
上八物，合冶下筛，作散。服方寸匕，日三，以酢浆下散。病在上，倒输卧；在下，高
枕，使药流下。
The *Zhubing Yuanhou Lun* (Treatise on the Pathogenesis and Symptoms of All Diseases) states: "Pifu" (a skin condition resembling scabies or tinea, caused by the accumulation of cold pathogenic factors) arises from exposure to cold, leading to abdominal distension. When residual cold toxins remain in the body unexpelled, they transform into this condition. At the onset, lesions appear on the neck and nape, causing high fever with symptoms similar to *Shanghan* (Cold Damage disease). The appearance resembles scabies or tinea, with numerous small pores emerging on the skin; its root lies in the Lung.
The *Liu Juanzi Fang* (Formulas of Liu Juanzi) for treating Pifu notes that it begins at the neck, initially presenting like *Shanghan*. This is due to ingesting food contaminated with Pifu toxins that fail to be expelled.
Prescription: Cortex Pruni Persicae Albus (one fen), Atractylodis Macrocephalae Rhizoma (four fen), Anemarrhenae Rhizoma (one fen), Realgar (one fen), dried Rehmanniae Radix (one fen), [missing character] bark (four fen), Angelicae Pubescentis Radix (one fen), Zanthoxyli Fructus (100 pieces), Indigo Naturalis (one fen), Mylabris (one fen), Angelicae Dahuricae Radix (one fen), Plagiogyriae Resina (one fen), Paeoniae Radix Alba (one fen), Fucus Vesiculosus (one fen), Angelicae Sinensis Radix (one fen).
These fifteen ingredients are mixed, pounded into a powder, and sifted. Take one qianbi (a spoonful measure) per dose, three times daily. If the pathology is interior (in the viscera), take on an empty stomach; if exterior (on the skin), take after meals. Another formula: Omit Mylabris and Atractylodes.
The *Zhubing Yuanhou Lun* states: "Qicao" (a subcutaneous nodule or mass, shaped like a jujube pit) arises from fear, sorrow, excessive worry, and incessant crying, where residual toxins transform into this condition. At onset, it appears on the neck and nape, lacking distinct head or tail, resembling a jujube pit. It may migrate within the subcutaneous tissue, causing alternating chills and fever, along with chest fullness and distress; its root lies in the Heart.
The *Liu Juanzi Fang* states: To treat Qicao, which begins at the neck, lacks head or tail, and presents as a jujube-pit-like lump often located within the skin, causing chills, fever, and chest fullness. This results from emotional agitation, anger, or crying.
Prescription: Azurite (two fen), Angelicae Sinensis Radix (two fen), Asari Radix et Rhizoma (one liang), dried Cinnamomi Ramulus (one fen; another version uses Cinnamomi Cortex), Lycii Radicis Cortex (one fen), Mylabris (one fen, wings removed), Euphorbiae Lathyridis Semen (one fen), dried Avian Brain (quantity equivalent to three soybeans).
These eight ingredients are ground together and sifted to make a powder. Take one fangcunbi (a square-inch spoonful) per dose, three times daily, administered with vinegar juice. If the lesion is located superiorly, the patient should lie upside down; if inferiorly, use a high pillow to facilitate the downward flow of the medicine.