Genital warts (condylomata) A small bump on the genitals caused by a common sexually transmitted infection. Genital warts are a common sexually transmitted infection caused by the human papillomavirus (HPV). Very common Spreads by sexual contact Treatment can help, but this condition can't be cured Usually self-diagnosable Lab tests or imaging rarely required HOW IT SPREADS By having unprotected vaginal, anal or oral sex. By skin-to-skin contact (handshakes or hugs).