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The three pathogenic factors of wind, dampness, and cold mix together to combine and form Bi syndrome (Obstruction Syndrome). Although collectively referred to as combined Bi, their clinical manifestations differ. When wind is predominant, it forms Xing Bi (Wandering Bi); when cold is predominant, it forms Tong Bi (Painful Bi); when dampness is predominant, it forms Zhuo Bi (Fixed Bi). These three pathogens invade the meridians, entering the sinews, vessels, flesh, and skin. If not cured for a long time, they enter the five Zang organs. Whenever one experiences irritability and fullness, wheezing and vomiting, this indicates Bi pathogen lodging in the Lung; irritability with rebellious Qi, dry throat, fear of belching, cold limbs, and fullness indicate Bi pathogen lodging in the Heart; excessive drinking, frequent urination, lower abdominal pain resembling pregnancy, and night terrors indicate Bi pathogen lodging in the Liver; propensity for bloating, inability to walk upright replacing heels with buttocks, and spine curvature replacing the head indicate Bi pathogen lodging in the Kidney; flaccidity of the four limbs, coughing with frothy sputum, and severe obstruction above indicate Bi pathogen lodging in the Spleen. There is also Chang Bi (Intestinal Bi), characterized by frequent drinking but difficult urination,急促 breathing in the middle jiao, and occasional undigested stool diarrhea. There is also Bao Bi (Bladder/Reproductive Organ Bi), characterized by internal pain upon pressing the lower abdomen, a sensation as if scalded by hot water, dribbling urine, and clear nasal discharge above. Furthermore, each of the six Fu organs has its Shu points. When wind, cold, and dampness strike these Shu points, and dietary intake responds accordingly, the pathogens enter via the Shu points and lodge in their respective Fu organs. Treatment involves applying acupuncture and moxibustion according to the Shu points of the affected Fu organs, while administering herbs that expel wind, dampness, and cold and induce diaphoresis, leading to spontaneous recovery. Generally speaking, in Bi disease, excess cold causes pain, excess wind causes wandering pain, and excess dampness causes fixed heaviness; when in the bone, the body feels heavy and difficult to move; when in the vessels, blood coagulates and fails to flow; when in the sinews, flexion occurs without extension; when in the flesh, there is numbness; when in the skin, there is coldness, with contraction upon exposure to cold and relaxation upon exposure to heat. There is also Blood Bi, which is classified here due to similarity. External cases where Zhi Yin (Branching Fluid Retention) causes Bi are detailed in the Phlegm-Fluids section.

To treat Bi caused by wind, dampness, and cold, involving joint pain, skin numbness, muscle heaviness, and flaccidity of the four limbs:
Fuzi (Aconiti Lateralis Radix Praeparata, raw, peeled and navel removed) Baishao Yao (Paeoniae Radix Alba) Guixin (Cinnamomi Cortex) Gancao (Glycyrrhizae Radix et Rhizoma) Baifuling (Poria) Renshen (Ginseng Radix) [each 3 fen] Baizhu (Atractylodis Macrocephalae Rhizoma) [1 liang]
Crush the above ingredients into coarse powder. Take 4 qian per dose, add 3 zhan of water, decoct until reduced to 7 fen volume, strain, and take before meals.

To treat "Zunrong Ren" (persons of noble constitution) with weak bones and loose muscles, who develop Blood Bi after fatigue-induced sweating, restless sleep, and exposure to slight wind. The pulse should be micro in both Yin and Yang positions, slightly tight at the Chi position, and the body presents symptoms similar to Feng Bi (Wind Bi):
Huangqi (Astragali Radix) Shaoyao (Paeoniae Radix) Guixin (Cinnamomi Cortex) [equal parts]
Crush the above ingredients into coarse powder. Take 4 da qian per dose, add 2 zhan of water, 5 slices of fresh ginger, and 3 dates, decoct until reduced to 7 fen volume, strain, and take before meals.