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Phlegm-fluid (Tan-Yin) lurking in the Bao-luo (pericardium collaterals) is coughed out through the lung orifice. Saliva (Xian) lingering in the Spleen and Stomach flows out from the corners of the mouth. Fluid (Yin) generated in the Stomach Fu organ is vomited up from the food passage. There are six types of fluid syndromes:

Water retention in the Intestines and Stomach, with a gurgling sound in the abdomen, is called Tan-Yin (Phlegm-Fluid). Water flow lodging in the hypochondrium, causing pain upon coughing and expectoration, is called Xuan-Yin (Hanging Fluid). Water flow lodging in the limbs, causing heaviness and pain in the body, is called Yi-Yin (Overflowing Fluid). Water retention above the diaphragm, causing fullness, counterflow qi, reliance on breathing for relief, shortness of breath, and inability to lie flat, is called Zhi-Yin (Supporting Fluid). Water retention below the heart (epigastrium), causing coldness in the back the size of a palm, pain in the joints of the four limbs, and aggravated cough at the Quepen (ST12) acupoint, is called Liu-Yin (Retained Fluid). Water retention causing diaphragmatic fullness, vomiting, wheezing, coughing, lower back pain, and tearing, is called Fu-Yin (Hidden Fluid). These six differ but all arise from water retention, as well as the accumulation of tea and wine that fails to dissipate, compounded by external pathogenic factors, raw/cold foods, and emotional disturbances, which interact to form the condition. The pulse is often wiry and slippery or deep/hidden; the skin under the eyes appears dark black like charcoal. The treatment principle targets the area between the skin and fascia. For manifestations in the exterior layer, induce sweating. For those in the chest and diaphragm, induce vomiting. For those in the four limbs, meridians, and hypochondrium, promote differentiation and urination. For those in the interior of the intestines and stomach, purge downward. If a patient experiences pain in one arm that shifts to the other arm after a short time, and the pulse is deep and thin rather than indicating Wind, it must be due to fluid retention in the Upper Jiao.

Wa-Xian Wan (Saliva-Digging Pill): Treats all phlegm-fluid syndromes, characterized by gurgling sounds in the throat, cold numbness in the hands and feet, and obstruction of Qi and pulses.
Ingredients: Da Ji (Kansui Radix), Bai Jie Zi (White Mustard Seed), Gua Lou Qu (Prepared Trichosanthes Fruit), Bo Gui (Thin Cinnamon Twig) (each 2 liang); Bo Gui (3 qian); Quan Xie (Whole Scorpion) (8 units); Xiong Huang (Realgar), Zhu Sha (Cinnabar) (each 1 qian).
Preparation and Administration: Grind the above ingredients into fine powder. Form pills using rice flour paste, sized like wu zi (wu-tzu seeds). Take 60–70 pills per dose, administered with ginger decoction before sleep.

Wu Yin Tang (Five Fluid Decoction): Highly effective for treating five types of fluid syndromes: Liu-Yin (Retained Fluid), Pi-Yin (Mass Fluid), Tan-Yin (Phlegm-Fluid), Yi-Yin (Overflowing Fluid), and Liu-Yin (Flowing Fluid).
Ingredients: Xuan Fu Hua (Inula Flower), Ren Shen (Ginseng Root), Ju Hong (Tangerine Peel), Zhi Shi (Immature Bitter Orange), Bai Zhu (Atractylodes Macrocephala Rhizome) (each 1 qian); Fu Ling (Poria), Nong Po (Magnolia Bark), Ban Xia (Pinellia Tuber), Ze Xie (Alisma Rhizome), Lie Ling (Polyporus) (each 8 fen); Qian Hu (Peucedani Radix), Gui Xin (Cinnamon Heart), Bai Shao (White Peony Root), Gan Cao (Licorice Root) (each 6 fen).
Preparation and Administration: Decoct with 5 slices of fresh ginger and take orally.

Jiang Tan Wan (Phlegm-Descending Pill): Treats closure of Qi in the Three Jiao, phlegm-fluid distension and fullness, coughing with expectoration, limb fatigue, and loss of appetite.
Ingredients: Mu Xiang (Aucklandiae Radix), Bing Lang (Areca Seed), Qing Pi (Green Tangerine Peel), Chen Pi (Aged Tangerine Peel), San Leng (Curcuma Zedoaria Rhizome), Zhi Ke (Bitter Orange Fruit, stir-fried with bran), Ban Xia (Pinellia Tuber, processed with ginger and alum), Da Huang (Rhubarb Rhizome), Hei Qian Niu (Black Morning Glory Seed) (each 1 liang).
Preparation and Administration: Grind the above ingredients into fine powder. Form pills using wheat flour paste. Take 3 qian per dose, administered with ginger decoction before meals.