Corns and Bunions on Feet: Telling Them Apart

Corns and bunions get grouped together because the same tight shoe produces both, but they are not the same kind of problem. A corn is skin: a well-delimited focal area of thickening that forms where something rubs. A bunion is bone: the AAOS defines it as a painful bony bump on the inside of the foot at the big toe joint, with the toe drifting toward its neighbors.

Skin problem, bone problem

Press a corn and you are pressing hardened skin over a bony point underneath. Press a bunion and you are pressing the joint itself, displaced. That distinction decides everything downstream: a corn can be pared away and will come back only if the rubbing continues, while a bunion cannot be filed off at all, because the shape of the foot has changed.

What a corn looks and feels like

MedlinePlus places corns on the tops or sides of the toes and calluses on the soles. The APMA adds the more reliable rule — the pattern matters more than the location. Flat, widespread thickening is a callus; something thicker or deeper, with a hard center, is a corn. Corns hurt in a point, because that central core presses down on what lies beneath. Full comparison in corn vs callus.

What a bunion looks and feels like

The AAOS describes hallux valgus as progressive: the long metatarsal shifts toward the inside of the foot while the bones of the big toe angle toward the second toe. The bump is what you see; the drift is what is actually happening. Symptoms are pain and tenderness, redness and inflammation, hardened skin on the sole, a callus or corn on the bump itself, and stiffness with limited big toe motion. See bunion symptoms for the full list, and bunion pain causes for why the same bump hurts on some days and not others.

The toe box they share

A narrow, pointed toe box forces the toes into an unnatural position — the AAOS words for it — and that single design choice both accelerates a bunion and creates the friction that thickens skin. Where a bunion has already shifted the toes, the toes themselves start rubbing, which is how a soft corn between toes shows up on a foot that never had one before.

Where the two collide

The AAOS lists corns and calluses among bunion complications, alongside bursitis over the bump, hammer toe in the second toe, and arthritis from damaged joint cartilage. In practice a long-standing bunion arrives with an entourage: hardened skin under the ball of the foot, a corn on the prominence, a second toe pushed up out of the way.

What helps, and what to skip

• Wide toe box, low heel. The one change that addresses both problems at the source.
• Non-medicated padding, which MedlinePlus lists as a reasonable self-care step.
• A pumice stone in the bath, gently, to reduce thickened skin.
• Not shaving or cutting it. MedlinePlus warns against it outright, to avoid infection.
• Not reaching for acid pads without advice, given the APMA’s burn and ulcer warning.

When to see a podiatrist

Book an appointment if either causes persistent pain, if ordinary shoes have stopped fitting, if the bunion is visibly growing, or if the skin cracks or shows signs of infection. If you have diabetes or reduced circulation, skip the self-treatment step entirely — the APMA and MedlinePlus both single that group out.

This content is informational and does not replace a medical consultation, diagnosis, or treatment.