Nope: Don’t cringe away from your friends or family affected with skin tags; they pose no threat to you whatsoever. Even though some skin tags may be caused by a virus (HPV), once the virus has embedded itself, it’s not going anywhere. “Viruses land on your skin all the time and the virus itself is minimally contagious because the skin is not a great habitat on its own,” notes Dr. Johnson. “It takes a special environment to give the virus a chance to infect our skin cell DNA. Once it has survived and embedded itself, the skin keeps it isolated so that the only result is the skin tag itself.” Here are the 37 worst pieces of advice dermatologists have heard.