This content is for informational purposes only and does not constitute medical advice. Please consult with a licensed podiatrist for a personalized evaluation and treatment plan. Individual results may vary.

Plantar warts, corns, and calluses can all look like rough, thickened spots on the bottom of the foot, but their causes are very different. Plantar warts are skin growths caused by a virus, while corns and calluses are thickened skin that forms from pressure and friction. The fastest way to tell them apart is to look for tiny black dots and check what hurts: warts often have dark specks and sting when pinched from the sides, while corns and calluses hurt with direct downward pressure. A growth that bleeds, spreads, or stays painful usually needs a podiatrist’s care.

Anyone in Los Angeles who is unsure whether a sore spot is a wart, a corn, or a callus can get a clear diagnosis and the right treatment from the foot care team led by Dr. Arkady Kaplansky. Correct identification matters, because the treatments are not the same.

A close-up composition with a shallow depth of field, sharply focusing on the sole of a bare foot held by hands in bright blue nitrile gloves. The right gloved hand holds a circular magnifying device with an illuminated LED ring light directly over a small, textured spot on the skin. The lighting is characterized by cool, bright, and even clinical illumination, complemented by the intense, localized ring of white light from the magnifier. The background falls into a soft blur (bokeh), showing muted gray and white tones of a medical exam room, including out-of-focus cabinets and a metal tray. The examiner wears dark blue scrubs with a tiny, illegible white text logo blurred on the left chest pocket.

What Plantar Warts Are

Plantar warts are small, rough growths that appear on the soles of the feet. They are human papillomavirus warts, meaning they are caused by certain strains of HPV that enter the skin through tiny cuts or breaks. According to Cleveland Clinic, common strains behind plantar warts include HPV types 1, 2, 3, 4, 27, and 57. Because they grow on weight-bearing skin, they often press inward and feel like a pebble in the shoe.

How Plantar Warts Spread

The virus thrives in warm, damp places. People often pick it up by walking barefoot in locker rooms, around public pools, or in shared showers. Human papillomavirus warts on feet can also spread from one part of the foot to another, or to other people, through direct contact or shared towels and shoes. Small breaks in the skin make infection more likely, which is why warts on feet are common in active people and children.

What Plantar Warts Look Like

A key clue is the surface. Plantar warts interrupt the normal lines and ridges of the skin, almost like a pebble dropped into a fingerprint. Many show tiny black dots, sometimes called wart seeds, which are actually small clotted blood vessels. Cleveland Clinic describes these brown or black specks as a hallmark of plantar warts. The warts are often grainy or cauliflower-like and may grow in clusters.

What Corns and Calluses Are

Corns and calluses are not infections. They are the body’s response to repeated rubbing and pressure. The skin thickens to protect itself, which is helpful up to a point but can become painful. As MedlinePlus explains, both form on areas that take repeated friction, most often on the feet.

Corns: Small and Deep

Foot corns are small, round, and dense, with a hard center that can press on nerves and cause sharp pain. Hard corns usually form on the tops or sides of the toes, where bone pushes against the skin inside a shoe. Soft corns are whiter and rubbery and tend to appear between the toes, where moisture builds up. A corn on the foot is often surrounded by a ring of slightly inflamed skin.

Calluses: Broad and Flat

Skin calluses are larger, flatter, and less defined than corn. They build up on the heel, the ball of the foot, or under a toe, and they are usually yellowish or pale. Calluses are often painless and serve as a shield against constant pressure. Unlike warts, calluses do not have black dots, and the natural skin lines run right through them instead of stopping.

Key Differences Between Warts, Corns, and Calluses

The calluses and corns difference comes down to size and shape: corns are small with a hard core, while calluses are broad and flat. Telling either one apart from a wart is easier with two simple checks. The first is the skin-line test. Warts break up the skin’s ridges, while corns and calluses keep them intact. The second is the squeeze test, a method podiatrists use often.

  • Skin lines: warts interrupt them; corns and calluses preserve them
  • Black dots: common in warts; absent in corns and calluses
  • Pain on a side-to-side pinch: typical of a wart
  • Pain on direct downward pressure: typical of a corn or callus
  • Spread: warts can multiply; corns and calluses do not

No single sign is perfect, and some growths share features. When the cause is unclear, a professional exam settles the question quickly.

Different Types of Warts and Skin Growths

There are different types of warts, and not all of them appear on the feet. Common warts often show up on the hands and fingers, flat warts tend to form in clusters on the face or legs, and plantar warts grow on the soles. Common warts and plantar warts share the same viral root but look different because of where they grow. Knowing the type helps guide treatment, since a thick plantar wart on a pressure point behaves differently from a small wart elsewhere on the body.

When to See a Podiatrist in Los Angeles

Many small warts and mild calluses clear up with time and basic care. Still, certain situations call for professional help. People with diabetes or poor circulation should never treat foot growths at home, because a minor wound can turn serious. A growth that bleeds, changes color, multiplies, or keeps hurting also needs an exam. Even small warts on a child’s foot are worth checking if they spread or do not respond to gentle care.

A podiatrist can confirm whether a spot is a wart, a corn on the foot, or a callus, and rule out other skin problems that can mimic them. In Los Angeles, that evaluation is available through Dr. Arkady Kaplansky’s practice, where the goal is an accurate diagnosis before any treatment begins.

Treatment Options That Work

Because warts are viral and corns and calluses are mechanical, the two problems are treated in different ways. Matching the treatment to the cause is what makes it work.

Treating Plantar Warts

Plantar warts sometimes go away on their own, but thick or painful ones often need treatment. Options include salicylic acid, freezing (cryotherapy), and other in-office methods that remove the infected tissue. Because the virus can linger, warts may return and need more than one session. A podiatrist can choose the safest approach for warts on weight-bearing skin.

Treating Corns and Calluses

Corns and calluses respond to pressure relief. As the American Academy of Dermatology advises, soaking the skin, gently filing it with a pumice stone, and wearing better-fitting shoes can ease most cases. Protective pads help, and a podiatrist can safely trim thick skin. Cutting corn with a razor at home is risky and can cause infection, so professional care is the better path when the buildup is deep or painful.

What Causes These Foot Growths to Form

Knowing the root cause of each problem makes prevention and treatment clearer. Warts and pressure spots share the same neighborhood on the foot, yet they begin in completely different ways.

Why Warts Take Hold

Plantar warts start when HPV slips through a small break in the skin. Damp public floors give the virus a place to live, and a tiny cut or a softened area from sweat gives it a way in. A weaker immune system, common in young children and some older adults, makes it easier for warts to take hold and harder for the body to clear them. This is one reason warts on feet are common among swimmers, gym-goers, and kids who walk barefoot. Even small warts can multiply if they are scratched or picked, spreading the virus to nearby skin.

Why Corns and Calluses Build Up

Corns and calluses come from steady pressure rather than a germ. As Cleveland Clinic notes, repeated friction and rubbing prompt the skin to thicken on the bony, walked-on parts of the foot. Tight or loose shoes, high heels, thin socks, and foot shapes like bunions or hammertoes all raise the risk. Standing or walking for long hours adds to it. The thickened skin is protective at first, but once a corn forms a hard core, it can press on nerves and turn painful.

How to Prevent Plantar Warts, Corns, and Calluses

Simple daily habits lower the odds of all three problems. Most center on protecting the skin from both germs and pressure.

  • Wear sandals or shower shoes in locker rooms, pools, and public showers
  • Keep feet clean and dry, and change damp socks promptly
  • Choose well-fitting shoes with enough room in the toe box
  • Use cushioned insoles or pads over high-pressure spots
  • Avoid sharing towels, socks, or shoes to limit virus spread
  • Moisturize thick, dry skin to keep calluses from cracking

For people with diabetes or numb feet, a daily foot check is especially important. Catching a new wart, a corn on the foot, or a cracked callus early prevents bigger problems down the road. When something looks off, a podiatrist’s exam is the safest next step.

Frequently Asked Questions

How Can Someone Tell if It’s a Plantar Wart or a Callus?

A plantar wart usually interrupts the skin lines and may show tiny black dots, while a callus keeps the skin lines intact and has no dots. A wart often hurts when pinched from the sides, but a callus hurts with direct pressure. When the difference is unclear, a podiatrist can confirm it.

How Are Plantar Warts and Corns Different?

Plantar warts are caused by a virus and can spread, while corns come from pressure and do not spread. Warts may have black specks and disrupt the skin’s surface, whereas a corn has a hard central core surrounded by thickened skin. Their treatments are also different.

What Is the Squeeze Test for Plantar Warts?

The squeeze test means pinching the growth from side to side rather than pressing straight down. Plantar warts tend to be painful when squeezed sideways, while corns and calluses hurt more with direct downward pressure. It is a quick clue, though not a final diagnosis.

How Do Corns and Calluses on the Foot Differ?

A corn is small and round with a hard center, and it usually forms on or between the toes. A callus is larger, flatter, and more spread out, often on the heel or ball of the foot. Corns are more likely to be painful because the core presses on nerves.

Are Plantar Warts Contagious?

Yes. Plantar warts come from HPV, which spreads in warm, damp places like pool decks and locker rooms. The virus can pass through direct contact or shared items such as towels and shoes. Covering the wart and avoiding barefoot walking in public areas lowers the risk.

Can Plantar Warts Go Away on Their Own?

Some plantar warts clear up without treatment, especially in children, but this can take months or years. Painful, spreading, or stubborn warts usually need professional treatment. People with diabetes or circulation problems should seek care rather than wait.