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Swelling in the lower part arises from dampness; it is urgent to employ diuresis (promoting urination) to ensure a safe recovery. External therapy using navel application is as effective as divine intervention, while internally, Chenxiang Hupo Wan (Agarwood and Amber Pill) should be administered.
[Note] Swelling of the lower body refers to edema extending from the waist and umbilicus down to both feet. The etiology is caused by damp-heat in the Spleen meridian. It is imperative to urgently apply diuretic methods, which corresponds to the classic saying "purify the Yang-Bladder" (Jing Fu). Externally, use the navel application method; internally, administer Chenxiang Hupo Wan (Agarwood and Amber Pill).

Navel Application Method
Crotonis Fructus (Badou), oil removed (4 qian)
Hydrargyri Praecipitatum Album (Shuiyin Fen) (2 qian)
Sulfur (Liuhuang) (1 qian)
Grind together uniformly into a cake. First, wrap the medicine in a piece of new cotton cloth and apply it to the umbilicus. Secure it externally with silk bandages for approximately one shichen (two hours). Evil water will naturally be discharged. After three to five bowel movements, remove the medicine and nourish the body with congee to consolidate the healthy qi.

Chenxiang Hupo Wan (Agarwood and Amber Pill)
Descurainiae Semen Lepidii Semen (Tinglizi) (1.5 liang)
Prunus japonica Seed (Yuliren), peeled (1.5 liang)
Stephaniae Tetrandrae Radix (Fangji) (0.75 liang)
Aquilariae Lignum Resinatum (Chenxiang) (1.5 liang)
Citri Reticulatae Pericarpium (Chenpi), white pith removed (0.75 liang)
Electrolytum (Hupo) (0.5 liang)
Armeniacae Semen Amarum (Xingren), peeled, core removed, stir-fried (0.5 liang)
Perillae Fructus (Suzi) (0.5 liang)
Poria Cocos (Chiling) (0.5 liang)
Alismatis Rhizoma (Zexie) (0.5 liang)
Grind all into fine powder. Bind with refined honey to form pills the size of Sophora japonica seeds. Coat with Moschus (Shexiang). Each dose is 1 qian, adjusted according to the child's age and size. Take with boiling plain water.

Generalized edema belongs to wind-dampness; dispersing externally and draining internally is most appropriate. For severe cases, use Shuozao Yin (Draining and Scouring Decoction) for vigorous purgation; for mild cases, use Fuling Daoshui Tang (Poria Water-Guiding Decoction) for harmonizing treatment. If water qi attacks the Lung causing asthma and inability to lie flat, Sutong Dingchuan Wan (Perilla and Tingli Pill for Asthma) is most suitable. If water retention occurs in the Middle Jiao causing abdominal distension and urgency, Zhouche Shenwan (Boat and Cart Divine Pill) can be used for purgation.
[Note] Generalized edema refers to swelling of the head, face, hands, and feet. The cause of illness is internal retention of damp-fluids combined with external contraction of wind-pathogens. Wind and dampness interact, obstructing the water passages. Water qi attacks the muscle surface externally, resulting in edema. Severe cases are treated vigorously with Shuozao Yin (Draining and Scouring Decoction); mild cases are treated harmoniously with Fuling Daoshui Tang (Poria Water-Guiding Decoction). If water retention attacks the Lung upward, causing rapid asthma and inability to lie down, treat with Sutong Wan (Perilla and Tingli Pill) to purge; if water retention causes distension in the Middle Jiao, treat with Zhouche Shenwan (Boat and Cart Divine Pill) to attack and purge.

Shuozao Yinzi (Draining and Scouring Decoction)
Phytolaccae Radix (Shanglu)
Gnawii Ramulus (Qinjiao)
Notopterygii Rhizoma et Radix (Qianghuo)
Sesami Fructus (Jiaomu)
Akebiae Caulis (Mutong)
Phaseoli Semen Rubrum (Chixiaodou)
Poria Cocos Cortex (Fuling Pi)
Arecae Pericarpium (Dafupi)
Alismatis Rhizoma (Zexie)
Areca Seed (Binglang)
Use Ginger Peel (Jiangpi) as a guide drug. Decoct in water and take orally.
[Formula Song] Shuozao Yinzi treats wind-damp edema, externally releasing and internally draining with Shanglu, Qinjiao, Qianghuo; Sesame fruit, Mutong, Phaseoli Semen Rubrum, Fuling Pi, Dafupi, Zexie, Binglang.

Fuling Daoshui Tang (Poria Water-Guiding Decoction)
Perillae Folium (Zisu)
Citri Reticulatae Pericarpium (Chenpi)
Atractylodis Macrocephalae Rhizoma (Baizhu), soil-stir-fried
Costi Radix (Muxiang)
Morus Alba Cortex (Sangbaipi), stir-fried
Ophiopogonis Radix (Maidong), heart removed
Poria Cocos (Chiling)
Alismatis Rhizoma (Zexie)
Chaenomelis Fructus (Mugua)
Arecae Pericarpium (Dafupi)
Amomi Fructus Rotundus (Suosharen)
Areca Seed (Binglang)
Use Juncus Effusus (Dengxincao) as a guide drug. Decoct in water and take orally.
[Formula Song] Harmonize with Fuling Daoshui Tang, containing Zisu, Chenpi, Baizhu, Muxiang; Sangbaipi, Maidong, Chiling, Zexie; Mugua, Dafupi, Suosharen, Binglang.

Sutong Wan (Perilla and Tingli Pill)
Zhouche Shenwan (Boat and Cart Divine Pill)
Kansui Radix (Gansui)
Genkwa Flos (Yuanhua)
Euphorbiae Pekinensis Radix (Daji), all vinegar-fried, each 1 liang
Rhei Radix et Rhizoma (Dahuang) (1 liang)
Pharbitidis Semen (Heiqianniu), first flush powder (4 liang)
Citri Aurantii Fructus (Qingpi), stir-fried
Citri Reticulatae Pericarpium (Chenpi)
Costi Radix (Muxiang)
Areca Seed (Binglang), each 0.5 liang
Calamina (Qingfen) (1 qian)
Grind the above into fine powder. Make pills with water, the size of Sesami Fructus (Jiaomu). Children take 2-3 pills; older children take 5-7 pills. Administer according to condition, taken with boiling plain water.