Noticed a small, hard patch on your foot that hurts when you walk? You might be wondering whether it is a verruca or a corn.
They can look similar, but a verruca is caused by a virus, while a corn develops because of pressure or friction. Understanding the difference helps you choose the right next step instead of repeatedly treating the wrong problem.
There are clues you can look for, although appearance alone cannot confirm a diagnosis. If you are unsure, a podiatrist can assess the area.
Verruca vs corn: the main differences
| Feature | Verruca | Corn |
|---|---|---|
| Cause | Human papillomavirus (HPV) infection | Repeated pressure or friction |
| Appearance | A rough growth, sometimes with tiny red or black dots | A localised area of thick skin, often with a firm central core |
| Location | Commonly on the sole; not limited to pressure points | Where the skin experiences pressure or rubbing |
| Discomfort | May hurt with sideways or direct pressure | Often more tender with direct pressure |
| Can it spread? | Yes, the virus can spread | No, corns are not contagious |
These are clinical clues rather than a reliable home test. In particular, pain when pressing or squeezing the area does not prove which condition you have. DermNet explains the diagnostic differences between plantar warts and corns.
What does a verruca look like?
A verruca is a wart on the foot. It may look rough and have a covering of hard skin, making it easy to mistake for a corn.
Tiny red or black dots can sometimes be visible. These are small blood vessels, not “seeds” or roots. The normal skin lines may also stop or become interrupted where they meet the verruca.
Some verrucas appear individually, while others form groups known as mosaic warts. Not every verruca looks the same, so the absence of obvious black dots does not rule one out. Read more about verruca appearance on DermNet.
What does a corn look like?
A corn is a small area of thickened skin that develops in response to repeated pressure or rubbing. It can have a firm central core and feel uncomfortable in shoes or when walking.
Corns can develop where shoes rub, on the toes or beneath the foot. Soft corns can appear between toes, where moisture keeps the skin softer.
Unlike a verruca, a corn is not an infection. Treatment therefore needs to consider what is creating the pressure, as well as the thickened skin itself. DermNet’s guide to corns and calluses explains this relationship.
Why does it matter which one you have?
The right treatment depends on the cause.
For a corn, reducing pressure is an important part of managing the problem. Removing hard skin without addressing rubbing footwear or another pressure source may allow it to return.
A verruca needs a different approach. Some disappear without treatment, although this can take months or years. Others become painful or persistent enough for someone to seek treatment. Pharmacy products do not always work and can irritate the skin. See the NHS guidance on verrucas.
If you have already tried treating the area without success, it is worth checking the diagnosis before trying another product.
| What to look for | Verruca | Corn |
|---|---|---|
| What causes it? | A viral infection in the skin. | Repeated pressure or rubbing, often from footwear. |
| What does it look like? | A rough patch that may be covered by hard skin. | A small, defined area of thick skin, often with a firm centre. |
| Are there black dots? | Tiny red or black dots may be visible. These are small blood vessels. | Usually no pinpoint dots. A dark mark alone cannot confirm the diagnosis. |
| Where does it appear? | Usually on the sole of the foot, including areas without much pressure. | At pressure points, such as over toes, between toes or beneath the foot. |
| How does it feel? | May hurt when walking or when pressure is applied from the sides or above. | Often feels tender when pressed directly or rubbed by shoes. |
| Can it spread? | Yes, to other areas of skin or other people. | No, corns are not contagious. |
| What can help? | Some clear naturally; others may need suitable verruca treatment. | Reducing pressure and friction, alongside professional corn care where needed. |
Can you treat a verruca or corn at home?
Do not cut, dig out or pick at an unidentified patch of skin. Avoid starting acid-based corn or verruca treatments until you know what you are treating and whether the product is suitable for you.
If you have diabetes, poor circulation or a weakened immune system, seek professional advice before treating foot lesions yourself. The NHS also advises older people not to self-treat corns and calluses.
For a confirmed corn, well-fitting shoes that do not rub and suitable cushioning may help reduce pressure. A pharmacist or podiatrist can advise on appropriate products. Read the NHS advice on corn care.
If you have a verruca, avoid picking it or sharing towels, socks and shoes. Cover it with a plaster when swimming and avoid walking barefoot in public places to help reduce spread. NHS advice on preventing verrucas spreading.
When should you get it checked?
Arrange an assessment if you cannot tell whether the area is a verruca, corn or something else.
See a GP if the lesion bleeds, changes appearance, produces pus or discharge, or causes severe pain. You should also seek advice if a suspected corn has not improved after three weeks of appropriate home care, or if a verruca keeps returning.
Do not assume that every unusual patch on your foot is a corn or verruca. These recommendations follow NHS guidance on corns and calluses and warts and verrucas.
Help with verrucas and corns in Strood and Sidcup
At Paul Miller Podiatry, we offer appointments at our Strood and Sidcup clinics to assess foot concerns and discuss suitable care.
If you are unsure what is causing a painful patch, an assessment is a useful starting point. You can also explore our corns and callouses service and verruca treatment options.
Our verruca service includes cryotherapy and acid-based treatments, with suitability discussed following assessment. Treatment results vary, and more than one appointment may be needed.
Contact Paul Miller Podiatry to book an appointment at our Strood or Sidcup clinic.
This article provides general information and does not replace an individual assessment by a qualified healthcare professional.