Dermatologists remove warts using several methods, from freezing and chemical blistering agents to scraping, lasers, and immune-boosting injections. The right approach depends on the wart’s size, location, and how long it’s been there. Most warts need more than one visit, and some stubborn ones require combining techniques or escalating to stronger options.
How the Dermatologist Confirms It’s a Wart
Before any treatment begins, your dermatologist needs to confirm the growth is actually a wart. This matters because warts can look a lot like calluses, corns, or other skin lesions. Most of the time, a visual exam is enough. For tricky cases, dermatologists use a handheld magnifying tool called a dermoscope, which reveals telltale patterns in the skin’s surface, like tiny dark dots (thrombosed capillaries) and disrupted skin lines that distinguish warts from lookalikes. Occasionally, a small sample is sent to a lab, but that’s uncommon.
Cryotherapy (Freezing)
Cryotherapy is the most common in-office wart treatment. Your dermatologist applies liquid nitrogen to the wart using either a cotton swab or a precision spray device. The extreme cold destroys the wart tissue and triggers your immune system to respond to the virus underneath.
Freezing times vary by location. Warts on the face get about 3 to 5 seconds of freeze time, while thicker plantar warts on the soles of the feet need 15 to 30 seconds. Warts on other body areas fall in between at 10 to 15 seconds. For non-facial warts, dermatologists typically do 2 to 3 freeze-thaw cycles per session, meaning they freeze the wart, let it thaw, then freeze it again.
It stings. Most people describe the sensation as a sharp burning feeling that fades within minutes. A blister usually forms over the next day or two, and the dead tissue peels away over the following week. Sessions are repeated every 1 to 2 weeks until the wart is gone. Many warts clear within 3 to 4 sessions, though stubborn ones can take longer.
Cantharidin (Beetle Juice)
Cantharidin is a blistering agent derived from blister beetles, and it’s a popular option for children because the application itself is painless. Your dermatologist paints the liquid directly onto the wart, then covers it with a bandage. You leave the bandage on for 2 to 48 hours depending on your doctor’s instructions.
Within 12 to 24 hours after removal, an intense blister or blood blister forms over the wart. The skin underneath and around it will look red and inflamed. The goal is to keep the blister intact as long as possible, since the blister lifts the wart tissue away from the healthy skin beneath. If the blister becomes extremely tight and painful, you can carefully puncture it with a sterilized needle after cleaning the area with alcohol. At your follow-up visit, the dermatologist trims away the dead wart tissue and checks whether another application is needed.
Electrosurgery and Curettage (Burn and Scrape)
For larger or more resistant warts, dermatologists may use a combination of electrical burning and scraping. This is a same-day procedure done under local anesthesia. Your dermatologist injects a numbing agent into the skin around the wart, or in some cases applies a numbing cream about an hour before the procedure.
Using a small electrode, the dermatologist applies electrical current to the wart. The electrode either touches the wart directly to destroy tissue at a deeper level, or is held just above the surface to create a spark that destroys the top layers. After the tissue is burned, a sharp, spoon-shaped instrument called a curette scrapes away the remaining wart material from the base.
The wound left behind is shallow and heals on its own over several weeks without stitches. During that time, you clean it daily with mild soap and water, then apply petroleum jelly and a non-stick bandage. Keeping the area moist prevents scabbing, which leads to better healing. Minimize physical activity for the first 24 hours, and use acetaminophen rather than ibuprofen or aspirin for pain, since those can increase bleeding risk.
Laser Treatment
Laser therapy is typically reserved for warts that haven’t responded to other methods. The most commonly used type, the pulsed dye laser, works by targeting the blood vessels that feed the wart. It selectively destroys those vessels, cutting off the oxygen and nutrient supply that keeps the infected skin cells growing. Without that blood supply, the wart tissue dies.
Research shows that pulsed dye lasers are effective and safe for recalcitrant plantar warts with tolerable side effects. The treated area may bruise or look purplish for a week or two. Multiple sessions are usually needed, spaced a few weeks apart. Laser treatment tends to cause less scarring than electrosurgery, which makes it a good option for warts in visible areas that haven’t cleared with less aggressive methods.
Immunotherapy Injections
When warts keep coming back or appear in large numbers, some dermatologists take a completely different approach: instead of destroying the wart directly, they wake up your immune system to fight the virus causing it. One well-studied method involves injecting a small amount of a yeast-derived antigen directly into a single wart. This provokes a localized inflammatory response that helps your immune system finally recognize the human papillomavirus (HPV) hiding in the skin.
The remarkable part is that treating just one wart this way can clear warts in other locations across the body. That happens because the injection triggers an adaptive immune response. Once your immune system learns to identify HPV at the injection site, skin-resident immune cells can attack the virus elsewhere. Injections are given every 2 to 3 weeks for up to 10 sessions, with a typical volume of 0.3 to 0.5 milliliters per wart.
This approach is particularly useful for people with many warts in different areas, since destroying each one individually would be impractical.
Professional-Strength Chemical Treatments
Dermatologists have access to much stronger chemical formulations than what you can buy at the pharmacy. Over-the-counter salicylic acid products max out around 17%, while dermatologists use concentrations of 30% or higher, sometimes applied in multiple layers for deeper penetration. Trichloroacetic acid, another chemical option, is used at concentrations of 30 to 50% to chemically destroy wart tissue in a controlled way.
These higher-strength agents break down the thickened, virus-infected skin more effectively than drugstore products. Your dermatologist applies them carefully to avoid damaging surrounding healthy tissue. You may feel a burning or stinging sensation during application. The treated skin turns white, then gradually peels away over the following days.
Why Warts Sometimes Come Back
Even with professional treatment, warts have a significant recurrence rate. Clearance rates for destructive treatments (freezing, burning, chemicals) are estimated at 70 to 80%, but recurrence rates run around 36%. The reason is straightforward: these methods destroy the visible wart tissue, but the virus can persist in surrounding skin cells that look perfectly normal. If the immune system doesn’t mount a strong enough response to clear the remaining virus, the wart regrows.
This is why dermatologists sometimes combine methods. You might get cryotherapy along with a prescription for a topical immune-boosting cream to use at home between visits, or your dermatologist might follow up a scraping procedure with cantharidin to catch any remaining infected tissue. For people who experience frequent recurrences, immunotherapy injections offer the best chance of a lasting solution because they address the underlying immune gap rather than just the visible growth.
What Recovery Looks Like
Recovery varies by method, but the basics are similar across most wart removal procedures. Keep the area clean with mild soap and water. Apply petroleum jelly or Aquaphor daily and cover with a non-stick bandage. Avoid picking at blisters or scabs, since letting the area heal naturally minimizes scarring.
Ice packs can help with swelling and discomfort, applied 15 minutes per hour as needed. Most people can return to normal activities within a day or two, though plantar warts on the feet may make walking uncomfortable for longer. Watch for signs of infection: increasing redness that spreads beyond the treatment area, warmth, pus, or worsening pain after the first couple of days.
Your dermatologist will typically schedule a follow-up in 1 to 3 weeks to check progress and decide whether another round of treatment is needed. For straightforward common warts, expect the full process to take anywhere from a few weeks to a few months depending on how your skin responds.