Herpes zoster is very common in clinical practice and its clustered blisters are easily scratched and can easily become infected if not properly cared for, so there is no need to intentionally wash with water. However, it can be cleaned with astringent medications, such as ezacridine lactate solution, or topical herbal solutions that have the effect of clearing heat and detoxifying and drying dampness, or you can clean the area with disinfectant solutions such as iodophor. However, when dealing with it on your own, you need to be careful not to cut the blisters to avoid infection.