If you’ve ever noticed a thick, rough spot on your foot, you’ve probably wondered:
“Is this a callus… or something else?”
You’re not alone—this is one of the most common questions we get in our office. While warts and calluses can look similar at first glance, they’re actually very different (and require different treatments).
Let’s break it down
What Is a Callus?
A callus is an area of thickened skin caused by repeated pressure or friction.
Common causes:
- Tight or ill-fitting shoes
- High-impact activities (running, walking, standing all day)
- Foot structure (like bunions or high arches)
What it looks like:
- Thick, yellowish skin
- Smooth or slightly rough
- Usually found on pressure points (heel, ball of foot)
- Not typically painful unless very thick or cracked
Think of a callus as your body’s way of protecting itself.
What Is a Plantar Wart?
A plantar wart is caused by a virus (HPV) that infects the skin.
How you get it:
- Walking barefoot in public places (pools, locker rooms, gyms)
- Direct contact with the virus
What it looks like:
- Rough, grainy lesion
- May have tiny black dots (“seeds”)
- Often interrupts normal skin lines
- Can be painful when squeezed side-to-side
Unlike calluses, warts are contagious and can spread.
| Feature | Callus | Wart |
| Cause | Pressure/friction | Virus (HPV) |
| Pain | Usually minimal | Pain with pressure/squeezing |
| Appearance | Thick, smooth skin | Rough, may have black dots |
| Skin lines | Continue through lesion | Disrupted |
| Contagious | No | Yes |
The “Squeeze Test” Trick
One easy at-home clue:
- Press straight down → hurts more? → likely a callus
- Squeeze side-to-side → hurts more? → likely a wart
Not always perfect—but helpful!
Why It Matters
Treating these incorrectly is very common.
- Using wart acid on a callus → irritation, no improvement
- Ignoring a wart → it can spread or become more painful
- Trimming at home → risk of injury or infection
When to See a Podiatrist
You should come in if:
- You’re unsure what it is
- It’s painful or getting worse
- It hasn’t improved with over-the-counter treatment
- You have diabetes or poor circulation
We can quickly diagnose it and offer treatments like:
- Safe callus reduction
- Custom offloading
- Wart treatments (topical, laser, or other in-office options)
Bottom Line
Not every “thick spot” on your foot is the same.
Callus = pressure problem
Wart = viral infection
Knowing the difference helps you treat it correctly—and get relief faster.
Need help figuring it out?
We’re happy to take a look and get you on the right treatment plan—no guessing required.