Herpes zoster is contagious, specifically, it is often not contagious before the blisters appear and is no longer contagious after the blisters have crusted over. Once broken, the fluid in the blisters is highly contagious, and people who have not been infected with the varicella-zoster virus can become ill after contact. Herpes zoster is mainly due to infection with the varicella-zoster virus, which is latent in the posterior root ganglion of the spinal cord or in the sensory ganglion of the brain nerve. When the latent virus is activated and replicates in large numbers, it causes inflammation in the invaded ganglion, resulting in a herpetic rash on the skin of the corresponding segment, accompanied by pain in the surrounding area. Patients with flying snake herpes need to strengthen skin cleanliness, change clothes regularly to prevent secondary bacterial infections, and also timely and effective antiviral symptomatic treatment, you can take oral antiviral drugs such as vaxilovir hydrochloride tablets, acyclovir, and mecobalamin, vitamin B1, vitamin B12, etc., nerve-nourishing drugs for treatment, but also the combination of topical compound cypress liquid wet compresses, coated with penciclovir cream, etc., when taking medication Pay attention to follow the doctor’s advice, do not use it privately.