The liquid nitrogen that doctors used to remove my skin tags hurt because my skin was being frozen and it felt like a burn. It was, of course, effective, but I decided not to go through the experience again. So I bought the DR. Reilly™ Skin Tag Remover to remove the rest of tags, which developed all over my neck, and it does the job. This one also uses the freezing method but minus the burning sensation. Tags just naturally fell off after two weeks.