Listed under “Herbs that release the Exterior”, included in “Warm, Acrid Herbs”, warm, acrid Angelica dahurica (bai zhi) enters the Lung, Stomach and Spleen channels. It dispels Wind and Cold in the exterior, dries Damp, discharges pus, removes swelling and relieves pain. It treats headache (esp. frontal) due to common cold, nasal obstruction, toothache, rheumatic arthralgia, menorrhagia, leukorrhagia, sores and boils.