What causes genital warts
Genital warts are a sexually transmitted infection caused by certain types of human papillomavirus (HPV) (Wikipedia). The types most often responsible are HPV 6 and 11. Cause the majority of genital warts, while types 16, 18, 31, 33, and 35 are occasionally found as well (Wikipedia). CDC guidance puts the same point plainly: anogenital warts are a common disease, and 90% are caused by nononcogenic HPV types 6 or 11 (CDC).
One distinction is worth holding onto, because it changes how you think about the diagnosis: the types of HPV that cause cancer are not the same as those that cause warts (Wikipedia). Warts are also the most easily recognized symptom of genital HPV infection (Wikipedia), and they may appear as a few individual warts or several, either clustered or merged into a cauliflower-like shape (Wikipedia). Many are asymptomatic, though depending on size and location they can be painful or itchy (CDC).
How they spread
Genital warts are a sexually transmitted infection, so transmission follows sexual skin-to-skin contact rather than casual touching of objects (Wikipedia). The same wart-causing HPV types are not confined to the genitals: HPV 6 and 11 have also been associated with conjunctival, nasal, oral, and laryngeal warts (CDC).
Because the infection is viral and often invisible, the appearance of a wart is not a reliable marker of when or from whom the virus was acquired. HPV types 16, 18, 31, 33, and 35 can commonly be identified before or at the same time anogenital warts are detected (CDC). Means a wart check can surface information about other HPV types at the same visit.
Treatment removes the warts, not the virus
Treatment is aimed at the visible warts. Removing them does not clear HPV from the body, which is why the virus can persist after the warts are gone. This is the single most useful thing to understand before starting any treatment: you are treating the growths, not curing the infection.
The practical consequence is that you should judge treatment by whether the visible warts resolve, and expect your clinician to discuss follow-up rather than declare the virus eliminated. If warts persist, enlarge, or return after treatment, that is a reason to go back for reassessment rather than to assume the treatment failed permanently.
Warts can come back
Recurrence is part of the pattern with genital warts, because the underlying HPV infection may remain after the visible growths are removed. New warts appearing after successful treatment are consistent with the virus persisting rather than with a new failure on your part.
That makes a follow-up plan part of treatment, not an optional extra. Knowing that return is possible lets you act early: if you notice new growths in the same or a nearby area, arrange a check rather than waiting to see whether they disappear on their own.
Vaccination prevents the main wart-causing types
Vaccination is the prevention lever that targets the types responsible for most genital warts. Because HPV 6 and 11 cause the majority of genital warts (Wikipedia) and account for 90% of anogenital warts (CDC), a vaccine covering those types prevents the main wart-causing infections.
Vaccination is a prevention decision, not a treatment for warts you already have. If you are weighing it, the relevant question is which HPV types a given vaccine covers and whether you have already received it. That is a conversation to have with a clinician or pharmacist who can check your vaccination history.
When to see a clinician
See a clinician when you notice new or changing growths in the genital or anal area, when warts are painful or itchy, or when warts return after treatment. CDC notes that anogenital warts are usually asymptomatic but can be painful or itchy depending on size and location (CDC). Discomfort alone is a legitimate reason to be checked.
Use the matrix below to match what you are seeing to the right next step.
| What you notice | Why it needs a check | Next step |
|---|---|---|
| New growths in the genital or anal area | Warts are the most easily recognized symptom of genital HPV infection (Wikipedia) | Book a clinician visit for assessment |
| Warts that are painful or itchy | Anogenital warts can be painful or itchy depending on size and location (CDC) | Ask for a check and discuss treatment options |
| Warts that return after treatment | The virus may persist after visible warts are removed | Return for reassessment rather than waiting |
| You want to know about vaccination | HPV 6 and 11 cause the majority of genital warts (Wikipedia) | Ask a clinician or pharmacist about HPV vaccine coverage |
If none of these apply and you simply want to confirm your vaccination status, that is a routine appointment rather than an urgent one.