HPV is typically diagnosed during your Pap smear. Dr. Jean-Gilles can also diagnose HPV by examining your warts. He may also use a vinegar solution test, which turns HPV-infected skin white. This is helpful when the warts are flat and not easily seen. If your Pap smear has abnormal results, Dr. Jean-Gilles performs a colposcopy to diagnose the cause of the results, which can confirm HPV.