Warm and transform phlegm-cold (wen, hua tan han)

Herbs that warm and transform phlegm-cold (wen, hua tan han) are warm in nature and treat cold-phlegm or phlegm-dampness obstructing the Lungs manifesting as cough with copious watery sputum. They also benefit fluid metabolism in the digestive system with their warming, drying and downward directing properties potentially resolving all types of phlegm at the source. Phlegm is a broad term, causing stubborn obstructions anywhere in the body, ranging from nodules and masses, paralysis and seizures. They tend to be strong in action and toxic without correct preparation.

Examples include ban xia (pinellia rhizome, Pinellia ternata), tian nan xing (Arisaema tuber, Arisaema erubescens) and bai fu zi (typhonium, Typhonium giganteum).