The utility model relates to an external medicament applying bag for treating shingles, which comprises a bag body and fixing straps, wherein, the two fixing straps are fixed at both ends of the bag body and are adjustable; the bag body is a gauze medicament applying bag in which indigowoad roots, injection red sage roots, coptis and Acyclovir mixed powder are filled. The medicament applying bag for treating shingles has the advantages that the structure is simple and convenient to use, which is favorable for patients to use personally; the shingles course is shortened, which reduces the morbidity of neuralgia sequela; the gauze medicament applying bag is made of six layers of gauze, which prevents the inside powder from leaking and ensures the medical liquor well reaching to the focus when in use.