An infected wart typically looks red, swollen, and inflamed compared to a normal wart, which is usually skin-colored and painless. You may also notice warmth around the area, pus or yellowish drainage, increased tenderness, and sometimes red streaks extending outward from the wart. These signs mean bacteria have entered the skin around or beneath the wart, and the infection needs attention.
How an Infected Wart Differs From a Normal One
A regular wart is a rough, raised bump that’s generally the same color as your surrounding skin or slightly darker. It might be annoying, but it shouldn’t be hot, oozing, or painful to touch. Common warts on the hands often have tiny black dots (small clotted blood vessels), and plantar warts on the feet can feel like a pebble underfoot. None of that signals infection.
When a wart becomes infected, the appearance shifts noticeably. The skin around the wart turns red and puffy, sometimes extending well beyond the wart’s original border. The area feels warm or hot when you touch it. Pain changes from mild or absent to a persistent throb or sharp tenderness, even when you’re not pressing on it. You may see pus, which can be white, yellow, or greenish, either sitting on the surface or leaking from a crack in the wart. A foul smell sometimes accompanies the drainage.
In some cases the wart itself looks like it’s breaking down or becoming crusty in a way that’s different from normal wart texture. The surrounding skin can appear tight and shiny from swelling. If the infection is on your foot, you might find it suddenly much more painful to walk than it was before.
What Causes a Wart to Get Infected
Warts sit on the skin’s surface and create a rough, uneven texture that’s easy to snag or tear. Any break in or around that tissue gives bacteria a way in. The most common cause is picking, scratching, or peeling at a wart. Nail biters are especially vulnerable because the habit damages the skin around fingertips and spreads both the wart virus and bacteria at the same time.
Shaving over a wart is another frequent trigger. A razor nicks the wart or the skin beside it, creating a tiny wound that bacteria colonize quickly. The same goes for clipping or filing plantar warts on your feet. Even well-intentioned grooming can break the skin barrier enough to let an infection start.
Over-the-counter wart treatments like salicylic acid patches or freeze sprays can also set the stage for infection if the surrounding skin gets too raw. These products work by destroying layers of skin, and if the area isn’t kept clean or is covered by dirty bandages, bacteria can take hold. People with diabetes or weakened immune systems face a higher risk because their bodies are slower to fight off bacterial invaders once the skin is compromised.
Signs the Infection Is Spreading
Most infected warts stay localized, meaning the redness, swelling, and pus remain close to the wart itself. But sometimes the infection moves deeper or travels through your lymphatic system, and the warning signs are distinct.
Red streaks extending away from the wart are the hallmark of a condition called lymphangitis, where bacteria have entered the lymph channels beneath your skin. These streaks can appear within hours and spread fast. According to Cleveland Clinic, an infection can move from the original wound to several areas of the lymphatic system in less than 24 hours. Left untreated, it can reach the bloodstream and cause sepsis, a life-threatening whole-body response to infection. If you see red streaks radiating from an infected wart, that requires immediate medical care, not a wait-and-see approach.
Other signs the infection has moved beyond the wart include fever, chills, body aches, and swollen lymph nodes near the affected area (for example, swollen glands in your armpit if the infected wart is on your hand). These flu-like symptoms paired with a visibly infected wart mean bacteria are no longer contained locally.
Infected Wart vs. Other Skin Problems
It’s worth knowing what an infected wart is not. An abscess (a deeper pocket of pus under the skin) can form near a wart but feels like a firm, painful lump beneath the surface rather than surface-level swelling. Cellulitis, a spreading skin infection, causes a broad area of redness and warmth that extends well beyond any single bump. Both of these can develop from an infected wart that goes untreated, but they look and feel different from the early stages.
A wart that bleeds after being bumped or scratched isn’t necessarily infected. Warts have blood vessels running through them, so minor bleeding is common. Infection shows up as the combination of redness, warmth, swelling, and often pus, not just bleeding alone. Similarly, a wart that’s changing color to dark brown or black after treatment is usually responding to the treatment (the tissue is dying), not becoming infected. The key distinction is always whether the area is hot, swollen, and producing discharge.
What to Do About an Infected Wart
A mildly infected wart, one that’s slightly red and tender but not producing much pus or spreading, can sometimes be managed by keeping the area clean, applying an antiseptic, and covering it with a fresh bandage. Soak the area in warm water for 10 to 15 minutes a few times a day to help draw out minor infection and reduce discomfort.
If the redness is growing, pus is increasing, or you’re developing pain that’s getting worse rather than better over a day or two, a doctor visit is the right move. The American Academy of Dermatology recommends seeing a dermatologist if a wart hurts, bleeds, burns, or is changing in appearance. You should also seek care if you have diabetes, a weakened immune system from conditions like HIV or cancer, or if the infected wart is on your face or genital area. These situations carry a higher risk of complications.
Treatment for a bacterial infection around a wart typically involves a course of oral antibiotics. In some cases a doctor will drain accumulated pus if there’s a visible collection. Once the infection clears, they can then address the wart itself with professional-strength treatments. Trying to remove a wart while the surrounding skin is actively infected usually makes things worse, so clearing the infection comes first.
Preventing Wart Infections
The simplest prevention is leaving warts alone. Don’t pick, scratch, pull, or bite at them. If you’re using an over-the-counter treatment, follow the instructions carefully and keep the area clean between applications. Change bandages daily and wash your hands before and after touching the wart.
Avoid shaving directly over warts. If you need to shave nearby, use a fresh razor and go around the wart rather than over it. On the feet, wear clean socks, keep plantar warts dry when possible, and avoid walking barefoot in shared wet areas like locker rooms or pool decks, which harbor both the wart virus and bacteria. If a wart cracks or bleeds for any reason, treat it like a small wound: clean it, apply an antiseptic, and cover it until the skin seals.