If you’ve ever noticed a hard, rough patch on the bottom of your foot, you might assume it’s just a callus. That’s a common belief, especially if you spend long hours on your feet. But sometimes, what looks like a simple callus could actually be a plantar wart.

Unlike calluses, which form from pressure or friction, plantar warts are caused by a viral infection—specifically, the human papillomavirus (HPV). The virus infects the outer layer of skin, causing small, often painful growths that can feel like a pebble under your foot.

So how can you tell the difference?

Plantar warts often have tiny black dots in the center, which are actually clotted blood vessels. They may hurt more when squeezed from the sides rather than from above. Calluses, by contrast, usually only hurt when pressed directly.

These warts are contagious and thrive in warm, moist environments like public showers, locker rooms, and pool areas. That’s why wearing sandals in these spaces and keeping feet clean and dry can help prevent infection.

Treatment for plantar warts focuses on removing the virus and protecting healthy skin. Over-the-counter wart treatments, dermatologist procedures, and proper foot hygiene are usually effective. Trying to scrape or cut a wart at home can actually make it worse or spread it to other areas.

The key takeaway? Not every hard patch is just a callus. If a spot on your foot is persistent, painful, or has unusual features, it’s worth checking with a healthcare professional. Early recognition makes treatment easier and keeps your feet healthy and comfortable.