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Your doctor can easily diagnose some strains of HPV with visual observation of your warts. Other symptom-less strains are tougher to discern. For women, a diagnosis of HPV is made with a Pap smear, an internal swab that is part of a normal check up and screens for cervical cancer. Many kinds of genital HPV cause precancerous changes in the cervical cells, prompting an abnormal test result. Following an abnormal result, the swabbed cells will be tested for HPV DNA to confirm the particular strain of the disease. Men, however, are out of luck when it comes to HPV screening - there are currently no tests available for them. Without any visible warts, men must rely on regular physical examinations by a doctor to spot precancerous cells and growths. Although genital HPV is a common - and often symptom-free STD - it can lead to serious health problems. For this reason, regular check ups and smart sexual practices are vital once a person becomes sexually active.