Snakebite generally refers to herpes zoster, which is contagious and may be passed on to others. Herpes zoster is mostly caused by the reactivation of the varicella-zoster virus that is latent in the body and then invades the nerve ganglia and becomes inflamed, causing herpes to appear on the skin. Since the fluid in the blisters contains virus particles, shingles is mainly spread by contact with the fluid in the blisters, so it is not contagious before the appearance of the blisters and after the blisters have crusted over, and is not contagious to others. However, it should be noted that once the blisters break, the fluid in the blisters is highly contagious, and contact with a patient with herpes zoster at this time may be contagious to others. Patients with shingles are advised to seek medical treatment as soon as possible, avoid sharing towels, clothes and other personal items with others in daily life, and try not to go to public places such as swimming pools.