The treatment of blisters after freezing depends on the shape of the blisters and the size of the erosion surface formed after the blisters have broken down. For small blisters, you can usually choose Chinese herbal medicines, such as Huang Lian, Huang Bai, Scutellaria and Amaranthus, which have the effect of cooling the blood and stopping bleeding and detoxifying heat, and combine with Rhubarb, which has the effect of activating blood stasis and detoxifying heat, to apply a decoction of water to the affected area twice a day for 20 minutes, after which you can apply a weak glucocorticoid ointment, such as Denide. If large blisters appear, a sterile syringe should be used to extract the herpes fluid for treatment. As for the blisters breaking down to form an erosion surface, topical polymyxin B ointment can also be applied twice a day.