Warm and Transform Phlegm-Cold (wen, hua tan han)

Herbs that are warm and transform Phlegm-Cold, such as ban xia (Pinellia ternata), are prescribed for cough and wheeze with phlegm of the cold type, i.e. coughs with copious, clear or white sputum and other cold signs. They also very often benefit the digestion as this is seen as the place of origin of phlegm, the lungs being the ‘storehouse’.