Comparison

Corn vs Bunion

A corn is thickened skin and can be pared down. A bunion is a joint change and cannot. How to tell in ten seconds, and why treating the wrong one wastes years.
Written & medically reviewed by the Dermapedia team
At a Glance

One is skin. The other is bone. That is the whole difference, and it decides everything else.

A corn is thickened skin built up over a pressure point. It can be pared down, and it goes away if the pressure does.

A bunion is a change in the joint at the base of the big toe. The joint drifts outward and makes a bump, and the big toe angles in toward the others. Nothing shaves off, because the bump is bone.

They get confused because a bunion rubs against a shoe, and the skin over it builds a callus or corn in response. So people see thick skin and treat that — while the thing underneath keeps pushing.

Corn
Thickened skin
Bunion
Joint change
A corn on the ball of the foot. The pale ring is the thickened skin and the denser spot at the centre is the core — that core is what presses inward and does the hurting, and it is why paring the surface alone gives only brief relief.
A bunion is bone, not skin. Look at the direction of the big toe rather than the size of the bump — here it angles clearly toward the second toe, which is the change that defines a bunion and the reason no amount of filing will alter it.

What the bump is made of

Skin

Layers of hardened skin over a pressure point, with a hard core in the middle.

Bone and joint

The joint at the base of the big toe has shifted. The bump is the head of the bone pushing out.

Both
Press it. A corn is on the surface and the skin moves. A bunion is hard, deep, and does not move.

Where it is

Anywhere pressure lands

Tops and sides of toes, between toes, the ball of the foot.

Base of the big toe

Almost always the inside edge of the foot. A smaller version at the base of the little toe is called a bunionette.

What your toe looks like

Normal
Angled inward

The big toe points toward the second toe, and over time may cross over or under it.

Both
This is the clearest sign. Look at the direction of the toe, not the size of the bump.

Does it change over time

Comes and goes

Better with different shoes, back again with the wrong ones.

Slowly gets worse

Bunions are progressive. They do not reverse on their own.

What it feels like

Sharp, localised

Like standing on a small stone.

Aching, joint-deep

Sore around the joint after standing or walking, and often worse in narrow shoes.

What helps

Take the pressure off.

Wider shoes, padding, and paring by a professional gives relief the same day.

Manage it, or fix it surgically.

Wide, low-heeled shoes, bunion pads, toe spacers and orthotics reduce pain but do not straighten the joint. Surgery is the only thing that corrects the alignment.

Can it be reversed without surgery

Yes

Remove the pressure and the skin returns to normal.

No

Splints, spacers and exercises can ease symptoms. No published evidence shows they realign the joint.

Both
Products sold as bunion correctors manage comfort. Be sceptical of anything promising to straighten the toe.

Who tends to get it

The pattern
Shoes that press in one spot, or a toe that sits proud.
The pattern
Often runs in families. More common in women, and narrow or high-heeled shoes make an existing tendency worse faster.
The sole of a foot held up off the floor, showing a small round patch of yellowed thickened skin with a denser core at its centre.
A corn on the ball of the foot. The pale ring is the thickened skin and the denser spot at the centre is the core — that core is what presses inward and does the hurting, and it is why paring the surface alone gives only brief relief.
The top of a bare foot seen from above, with the big toe angled inward toward the second toe and a prominent bony bump at the base of the big toe.
A bunion is bone, not skin. Look at the direction of the big toe rather than the size of the bump — here it angles clearly toward the second toe, which is the change that defines a bunion and the reason no amount of filing will alter it.

Why it matters which one you have

If you treat a bunion as a corn, you will keep filing skin off a bump that keeps coming back, and the joint underneath keeps drifting. Meanwhile the toe angle worsens, and the second toe often starts to buckle as it gets crowded.

Bunions are much easier to manage early — with shoe changes and support — than to correct late. Getting the name right is what gets you into the right pair of hands.

What to do now

  • Look at your big toe from above. Does it point straight ahead, or in toward the second toe?
  • Press the bump. Soft and superficial, or hard and immovable?
  • Look at your shoes. Is the toe box narrower than the front of your foot? For most people it is.

Wide toe box, low heel, and enough depth. That single change does more for both problems than anything you can buy in a tube.

See a podiatrist if

  • Your big toe is angling toward the second toe
  • The joint aches after normal walking or standing
  • The second toe is starting to lift, buckle, or cross
  • The bump is red, hot, and swollen — an inflamed bunion joint needs assessment, and gout can look similar
  • You have diabetes, neuropathy, or circulation problems and any foot bump at all
Questions people ask+
Bunion vs corn — what is the difference?A bunion is a change in the joint at the base of the big toe, so the bump is bone and nothing shaves off. A corn is thickened skin over a pressure point, and it can be pared down. A bunion often grows a corn or callus on top of it, which is why people treat the skin while the joint underneath keeps pushing.
How do I know if it is a bunion?Look at your big toe from above. If it angles in toward the second toe, that is a bunion. Then press the bump — a bunion is hard, deep, and does not move.
Can I have both at once?Yes, and it is common. A bunion rubs against the shoe, so the skin over it thickens into a corn or callus. People often treat the skin and miss the joint underneath.
Do bunion correctors work?They can ease pain and are worth trying for comfort. No published evidence shows splints, spacers or exercises realign the joint. Be sceptical of anything promising to straighten the toe.
Will a bunion get worse?Usually, slowly. Bunions are progressive and do not reverse on their own. They are much easier to manage early than to correct late.
Is surgery the only fix?Surgery is the only thing that corrects the alignment. Shoe changes, padding and orthotics manage symptoms well for many people, and plenty never need an operation.
Why is my bunion suddenly red and hot?An inflamed bunion joint needs assessment, and gout can look very similar in the same spot. That one is worth an appointment rather than a wait.