HPV virus (abbreviation for human papillomavirus) is a spherical DNA virus that easily infects human epidermis and mucosal squamous epithelium and has more than 130 subtypes. Different types have different pathogenicity and disease types, and can be classified according to the invasion of different tissue sites: 1, skin low-risk types: including HPV-1, 2, 3, 4, 7, 10, 12, 15, etc. associated with common warts, flat warts, plantar warts, etc.; 2, skin high-risk types: including HPV-5, 8, 14, 17, 20, 36, 38 associated with warty epidermal dysplasia, other also HPV-6, 11, 13, 32, 34, 40, 42, 43, 44, 53, 54, etc. are associated with genital, anal, oropharyngeal and esophageal mucosa; 4. Mucosal high-risk types: HPV-16, 18, 30, 31, 33, 35, 39 are associated with cervical, rectal, oral and tonsil cancer, etc. . There are two points to note about positive HPV virus, one positive does not mean disease; two pathogenic is not only cancer; some scholars have proposed that this virus can be carried for life without developing disease, so there is no need to worry too much once positive is detected.