Plantar warts are hard, grainy growths that appear on the soles of your feet. They’re caused by the human papillomavirus (HPV), which enters through tiny cuts or breaks in the skin. While they’re not dangerous, they can be painful and stubborn, sometimes lasting months or even years before they go away.
What Causes Plantar Warts
Plantar warts develop when certain strains of HPV infect the thick skin on the bottom of your foot. The virus needs a way in, so even a tiny crack, scrape, or area of soft, waterlogged skin can be enough. Once inside, the virus triggers rapid growth of the outer layer of skin, forming the tough, raised bump you see and feel.
The HPV strains that cause plantar warts aren’t highly contagious from person to person through direct skin contact. Instead, they thrive in warm, moist environments. Walking barefoot around swimming pools, locker rooms, gym showers, and saunas is one of the most common ways people pick up the virus. It can survive on these surfaces and wait for an opportunity to enter broken skin on someone’s foot.
You can also spread plantar warts to yourself. Touching a wart and then touching another part of your body can transfer the virus, a process called autoinoculation. Sharing shoes, socks, towels, or nail clippers with someone who has a plantar wart is another route of transmission.
How to Identify a Plantar Wart
Plantar warts have a rough, grainy texture and usually appear on the heel or ball of the foot, the areas that bear the most pressure. Because of that constant pressure, they often grow inward rather than outward, developing beneath a thick layer of hardened skin (a callus). This is what makes them feel like you’re walking on a pebble.
One of the most reliable identifying features is the presence of small black dots within the wart. These are sometimes called “wart seeds,” but they’re actually tiny clotted blood vessels. Another way to tell a plantar wart from a callus or corn is to look at the skin lines on the sole of your foot. Normal skin lines (like fingerprints) flow continuously across a callus, but a plantar wart disrupts those lines. The skin lines will go around the wart rather than through it.
Corns and calluses, by comparison, are simply areas of thickened, hardened skin caused by friction or pressure. They don’t have black dots, and they don’t interrupt skin lines. If you’re unsure what you’re dealing with, a healthcare provider can usually tell the difference with a quick visual exam, and occasionally by scraping off a small tissue sample.
Who Gets Them
Children and teenagers get plantar warts more often than adults, likely because their immune systems haven’t yet built up resistance to the HPV strains involved. People with weakened immune systems are also at higher risk, since their bodies are less equipped to fight off the virus before it takes hold. If you walk barefoot frequently in shared wet areas, or if you have dry, cracked skin on your feet, your risk goes up.
Do They Go Away on Their Own
Many plantar warts do resolve without treatment. About two-thirds of warts in children disappear on their own within two years. Adults tend to clear them more slowly, sometimes taking several years or longer. Whether you choose to wait depends on how much pain or inconvenience the wart is causing. A small, painless wart on a non-weight-bearing area might not need treatment at all. A wart on your heel that hurts with every step is a different story.
Pain from plantar warts can change the way you walk. You may unconsciously shift your weight to avoid pressure on the wart, and over time that altered gait can lead to discomfort in your legs, hips, or back.
Over-the-Counter Treatment
The most common home treatment is salicylic acid, available as liquids, gels, pads, and patches at most drugstores. It works by dissolving the wart layer by layer. You typically soak the foot in warm water, file down the dead skin with a pumice stone or emery board, apply the product, and repeat daily.
This is a slow process. It can take several weeks of consistent daily application to fully remove a plantar wart. Many people give up too early because the progress feels minimal at first. The key is persistence: file away the white, dead tissue before each new application so the acid can reach deeper into the wart. Use a dedicated file that you don’t share or use on healthy skin.
Over-the-counter freezing kits are also available. These use a cold spray to destroy wart tissue, though they don’t reach the same low temperatures as the liquid nitrogen used in a medical office, so they tend to be less effective on thick plantar warts.
Professional Treatment Options
If home treatment isn’t working after a couple of months, a healthcare provider has stronger options. Cryotherapy (freezing with liquid nitrogen) is the most common in-office treatment. It’s applied directly to the wart, causing a blister to form underneath. The dead tissue peels away over the following days. Cryotherapy often requires multiple sessions, with a median of about three visits needed for complete resolution in clinical studies.
Laser treatment is another option, particularly for warts that haven’t responded to other methods. A CO2 laser destroys the wart tissue with heat. Studies comparing laser treatment to cryotherapy found that laser typically requires fewer sessions (a median of one, compared to three for cryotherapy), though recurrence rates after three months were similar between the two approaches.
Other professional treatments include applying stronger prescription-strength acids, injecting medication directly into the wart to stimulate an immune response, or minor surgical removal. Your provider will choose based on the size, number, and stubbornness of your warts.
Preventing Spread and Reinfection
Whether you’re treating an active wart or trying to avoid getting one, the prevention strategies overlap. Wear sandals or flip-flops in locker rooms, pool areas, and public showers. Keep your feet clean and dry, since the virus moves more easily through damp, softened skin.
At home, give everyone their own towels, washcloths, socks, nail clippers, and razors. Wash your hands after touching or treating a wart. Keep cuts and scrapes on your feet clean and covered, since even small breaks in the skin give HPV an entry point. If you have dry, cracked skin on your feet, moisturizing regularly helps maintain that barrier.
Nail biting and cuticle chewing can also create openings for the virus to enter the skin around your fingers, so breaking those habits reduces your risk of warts in general. If you have excessive foot sweating, managing the moisture with absorbent socks or foot powder can help, since constantly damp skin is more vulnerable to infection.