When the Angelicae Dahuricae Radix (Baizhi, 白芷) turns yellow and the ointment is prepared, store it in a bottle. Apply and massage it onto the affected area according to the condition, which will lead to recovery. If sores erupt all over the body with pus, blood, ulceration, and necrosis, prepare Da Hei Gao (Great Black Ointment) for application and massage.