Reviewed by Evan Lewis, PhD. Last updated 11 August 2026.
Should warts be covered? Yes, in three situations: when you swim, when you share a shower or changing room, and after anything that has broken the skin. A plaster stops you picking at it and stops the virus reaching other people. The rest of the time, leave it uncovered and dry.
That is the short version. The longer version matters, because covering a wart badly is worse than not covering it at all. A damp plaster left on for days softens the skin around the wart, and softened skin is exactly what the virus spreads into.
When should you cover a wart?
Cover it any time the wart is going to be wet, bare, or touching a shared surface. The UK's NHS guidance on warts and verrucas is direct about this. It advises covering warts and verrucas with a plaster when swimming, changing socks daily if you have a verruca, and not walking barefoot in public places.
The reason sits in one line of that guidance: you are more likely to spread a wart if your skin is wet or damaged. Pool decks, gym showers and changing room floors are all three at once.
- Swimming and public pools. Cover it. This is the one everyone asks about and the one the guidance is clearest on.
- Shared showers, gyms, dojos and locker rooms. Cover it, and wear something on your feet.
- After freezing, filing, or any salicylic acid that has opened the skin. Cover it while it is raw.
- If you cannot stop touching it. A plaster is a physical reminder.
- Sharing a bed or a bath with family. Cover it at night if the wart rubs against someone else.
When should you leave it uncovered?
Most of the time. At home, in your own shoes, in your own shower, a wart is better off dry and open to the air. Skin that stays sealed under a plaster for days goes pale, soft and waterlogged, and that soft skin is easier for the virus to move into.
The practical rule is simple. Plaster on for the pool, the gym and the first days after treatment. Plaster off at home, and off overnight unless the skin is broken.
What should you cover a wart with?
A plain waterproof plaster is the right answer for almost everyone. It is cheap, it is breathable enough for short periods, and it does the two jobs that matter: it keeps the wart off shared surfaces and it keeps your fingers off the wart.
| Option | Best for | Watch out for |
|---|---|---|
| Waterproof plaster | Swimming, showers, gyms | Take it off when you get home and dry the skin |
| Fabric plaster | Overnight after treatment | Not waterproof, so useless at the pool |
| Hydrocolloid dressing | Raw skin after freezing | Turns white and gel-like, which is the dressing, not the wart |
| Felt ring or donut pad | A wart on the sole that hurts to stand on | Takes pressure off, does nothing to the wart itself |
| Duct tape | Nothing, on the evidence | See below |
Duct tape has a long internet reputation it has not earned. The Cochrane review of topical wart treatments looked at two trials covering 193 participants and found duct tape showed no advantage over placebo (Kwok et al., Cochrane Database of Systematic Reviews, 2012). The same review found salicylic acid did significantly increase clearance, though the effect was modest and weaker on plantar warts than on hand warts.
Apple cider vinegar sits in the same category as duct tape. It is popular, it is acidic enough to irritate skin, and there is no trial evidence behind it. If you use it and the skin gets angry, that is chemical irritation rather than progress.
Should you cover a wart after freezing it?
Yes, while the skin is open. Cryotherapy works by blistering the skin, so for a few days you have a genuine wound rather than just a wart. Keep it covered and dry until the blister has settled, then go back to leaving it open at home.
A blister after freezing is expected. A blister that is hot, spreading, streaking red, or leaking yellow fluid is not, and that is a same-week appointment rather than a wait-and-see.
What do the healing stages look like?
Warts do not fade politely. They tend to look worse before they look better, which is why so many people stop too early.
- Turning white and soft. Usually the treatment, not the wart. Salicylic acid whitens skin, and hydrocolloid dressings go white by design. It is also what happens to any skin left damp under a plaster.
- Turning black. Often the small blood vessels inside the wart clotting off. This is the stage people photograph and panic about, and it is generally the one that comes before it lifts.
- Going crumbly at the edges. The hard core starting to separate from normal skin.
- Flat skin with normal lines running across it. This is what finished looks like. If your fingerprint or footprint lines run straight over the spot, the wart is gone.
That last check is the most reliable one you can do at home. Wart tissue interrupts the skin lines. A study of 70 lesions in Cureus (Patil et al., 2023) found black or red dots in 100% of warts and none of the corns or calluses, with the skin lines broken in every wart and intact in every callus. If you are not sure which you are looking at, our corn vs wart pinch test walks through it, and plantar wart vs corn vs callus covers all three side by side.
How long does the whole thing take?
Longer than most people expect, and that is normal rather than a sign anything has gone wrong. DermNet's page on viral warts notes that in children, even without any treatment, 50% of warts disappear within six months and 90% are gone within two years. Adult immune systems tend to be slower with HPV, not faster.
So a wart you have had for months is ordinary. A wart you have had for ten years is worth getting looked at, not because it is likely to be sinister, but because a decade of no change means whatever you have been doing is not the thing that was going to shift it.
Where does a daily routine fit around all this?
Covering is damage control. It stops the wart reaching other people and other parts of your own foot. It does nothing about the environment that let the virus in.
That is the gap a daily foot routine fills, and it is the same routine that matters for anyone in shared showers. Dry between the toes properly. Rotate shoes so each pair gets a full day to dry out. Change socks daily. Never go barefoot on a pool deck or a gym floor. Sole Shield is the daily iodine spray we make for feet and shoes, and it goes on at night after the plaster comes off, over the area and the skin around it, as part of that routine rather than instead of it.
If you keep picking warts up in the same places, warts on feet: what causes them goes deeper on where they come from and how households pass them around.
When should you stop managing it yourself?
Book an appointment if the lump is bleeding without being knocked, changing shape or colour quickly, growing fast, painful enough to change how you walk, or if you have diabetes, poor circulation, or a suppressed immune system. In those last cases, skip the home stage entirely and get any foot lesion looked at properly.
Also go if you simply are not certain it is a wart. Several things on the sole look alike, and the American Academy of Dermatology's guidance on warts is worth reading before you attack anything with acid.
Common questions
What does a plantar wart look like when it's dying?
It goes dark or black at the centre as the tiny vessels clot, then crumbly at the edges, then flat. The finished test is the skin lines: when your footprint lines run straight across the spot instead of stopping at it, it is done.
Can you swim with a plantar wart?
Yes, with a waterproof plaster over it. NHS guidance specifically advises covering warts and verrucas with a plaster when swimming, and not walking barefoot in public places. Take the plaster off and dry the foot once you are home.
Why is my plantar wart turning white?
Almost always the treatment or the dressing rather than the wart. Salicylic acid whitens the skin it softens, hydrocolloid dressings turn white and gel-like by design, and any skin left damp under a plaster goes pale and soft.
Does the blood from a wart spread more warts?
The virus lives in the wart tissue, so treat any bleeding as material you do not want on other skin. Cover it, wash your hands, and do not share a towel. DermNet notes warts spread by direct contact and by autoinoculation, meaning picking or scratching can move the virus to another area of your own skin.
Are plantar warts dangerous?
For most healthy people they are a nuisance rather than a danger. They are caused by common HPV types that affect skin, not the types associated with cancer. What warrants a proper look is a lesion that bleeds unprovoked, changes quickly, or sits on the foot of someone with diabetes or poor circulation.
Can you get warts under or between the breasts?
Yes. Warm skin folds that stay slightly damp are a common site for warts and skin tags alike. The covering advice is the same, though a breathable fabric dressing beats a waterproof one anywhere sweat collects. EZ Clear Skin is the version of the spray we make for skin rather than feet.
How much does wart removal cost in Canada?
It depends who does it and whether it is considered cosmetic. Cryotherapy at a walk-in or family clinic is often covered provincially when medically indicated, while cosmetic removal at a private clinic is billed per session and usually needs several. Pharmacy chains including Jean Coutu and Shoppers stock over-the-counter freeze kits and salicylic acid at a fraction of that, which is where most people start.
How long does a wart take to heal after removal?
After freezing, expect a blister within a day, soreness for a few days, and the skin to close over in roughly one to three weeks. Several sessions a few weeks apart are normal. Healing time and clearance are different things: the skin can be closed long before the wart is actually gone.
What if I've had a wart on my foot for ten years?
Get it looked at. A decade without change is not usually sinister, but it does mean the approach so far has not been the one that shifts it, and anything on the sole that has been there that long deserves a proper diagnosis rather than another round of guesswork.
The bottom line
Cover a wart for the pool, the gym, shared showers and the raw days after treatment. Leave it uncovered and dry the rest of the time. Do not pick it, do not share towels, and do not read a black or white patch as a disaster, because both are ordinary stages on the way out.
References
- NHS. Warts and verrucas. Last reviewed 25 July 2023.
- Kwok CS, Gibbs S, Bennett C, Holland R, Abbott R. Topical treatments for cutaneous warts. Cochrane Database of Systematic Reviews, 2012. PMID 22972052.
- DermNet. Viral warts.
- American Academy of Dermatology. Warts: diagnosis and treatment.
- Patil S et al. Dermoscopic patterns in plantar warts and calluses. Cureus, 2023;15(4):e38093.
