Warm the Interior and Expel Cold (wen li, qu han)

Herbs that warm the Interior and expel cold, such as gan jiang (dried Zingiber officinalis), are used in cases of yang deficiency with concomitant cold signs. These may include cold extremities, loose stools and a pale complexion. Herbs in this category may also be used where external cold has penetrated the organs, predominantly disrupting digestive function (e.g. cold-type gastroenteritis).