Herb selection damp-heat syndrome

When patients suffer from chronic liver or kidney disease, the selection of the herbs and their dosages should be determined carefully to avoid placing an unnecessary workload on these weakened organs. At the same time, herbs that protect these organs and promote their function should also be included. For instance, acute or chronic liver diseases are mainly differentiated into a syndrome consisting of Spleen-Qi deficiency, damp-heat and heat-toxin accumulation, and herbs that treat this syndrome can be used. Chronic kidney diseases are mainly differentiated as Kidney-Yang and Spleen-Yang deficiency, dampness accumulation and heat-toxin in the blood. Herbs that treat this syndrome should be used in appropriate doses to help restore kidney function. 

Second, for treating damp-phlegm syndrome, bitter and warm herbs that can dry dampness, or sweet and bland herbs that can leach out dampness, are selected for treating phlegm-heat syndrome, cold and moistening herbs that can dilute phlegm are selected. 

The other three herbs are able to leach out dampness and promote urination. They can be selected in the formula to assist the chief and deputy herbs to remove damp-phlegm. Among these herbs, Fu Ling is neutral and can gently tonify the Spleen-Qi Ze Xie and Yi Yi Ren are cold and are more suitable for treating phlegm-heat syndrome. 

Qing Hao is bitter, cold and aromatic, and enters the Liver and Gall Bladder meridians. It can clear and disperse heat from these meridians, especially from the blood and Yin levels. In a formula that descends the Liver-Yang, Qing Hao is used as a corrective assistant to disperse and ascend the restrained Liver-Qi, which is suppressed by the heavy and cold descending minerals and herbs. Meanwhile, since Qing Hao can brighten the eyes, clear summer-heat and damp-heat, it can be selected if red and swollen eyes with blurred vision are present in the syndrome. 

These two herbs are usually used for Bi syndrome caused by wind, dampness and heat. They are also selected for treating some skin disorders caused by damp-heat. 

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