Foot corns are small, round bumps of hardened skin that form in spots where your foot gets repeated pressure or friction. They’re typically the size of a pea or smaller, with a firm, waxy, or slightly translucent center surrounded by dry, flaky skin. What they look like depends on which type you’re dealing with, since corns come in three distinct varieties that show up in different places and look quite different from one another.
Hard Corns
Hard corns are the most common type and the one most people picture. They appear as small, round, raised bumps with a dense core of compacted skin in the center. The outer ring is usually yellowish or grayish, while the center plug feels noticeably firmer and can look almost translucent or glassy. That central core is what makes corns painful: it acts like a tiny cone pressing into the deeper layers of skin beneath it.
You’ll find hard corns on the tops and sides of your toes, especially over the joints where shoes press hardest. They also show up on the outer edge of the little toe and occasionally on the ball of the foot. The skin immediately around a hard corn is often dry and slightly inflamed. When you press directly on the bump, it hurts, which is one of the easiest ways to confirm you’re looking at a corn rather than a callus.
Soft Corns
Soft corns look and feel completely different from hard corns. They form between the toes, most commonly in the web space between the fourth and fifth (smallest) toes. Because this area stays moist from sweat and skin-on-skin contact, the corn tissue becomes waterlogged and breaks down instead of hardening. The result is a white or grayish, rubbery lesion that feels tender and spongy to the touch.
Soft corns can be easy to miss at first because they hide between toes. If you spread your toes apart and see a pale, moist, slightly raised patch of skin that’s tender when you squeeze it, that’s the typical appearance. They’re often more painful than hard corns because the surrounding skin is thinner and more sensitive, and the constant moisture keeps the area irritated.
Seed Corns
Seed corns are the smallest type. They look like tiny, discrete dots of hardened skin, roughly the size of a sesame seed. They tend to appear in clusters on the sole of the foot, particularly on the heel or the ball of the foot. Unlike hard corns, seed corns usually don’t have a deep central plug, so they’re often painless or only mildly uncomfortable. Their surface is smooth and firm, and they can feel like small pebbles embedded just under the skin’s surface. Dry skin seems to make them more likely to develop.
Corns vs. Calluses
People often confuse corns and calluses because both involve thickened skin. The differences are straightforward once you know what to look for. Corns are small and round with well-defined edges. Calluses are larger, flatter, and spread out in an irregular shape without a clear border. Calluses also tend to be less sensitive to touch than the skin around them, while corns are the opposite: pressing on a corn typically produces a sharp, focused pain.
Location helps too. Corns favor the tops and sides of toes and the spaces between them. Calluses prefer the broad weight-bearing areas of the sole, especially under the heel and the ball of the foot.
Corns vs. Plantar Warts
This is the comparison that trips people up the most, because corns and plantar warts can appear in similar locations on the foot. The visual differences are reliable once you know them. A corn looks like a raised, hard bump surrounded by dry, flaky skin. The skin lines (the natural ridges on your feet, like fingerprints) pass smoothly over a corn.
A plantar wart, by contrast, has a grainy, fleshy texture and is peppered with tiny black dots. Those black pinpoints are small blood vessels that have grown into the wart. Skin lines typically detour around a wart rather than crossing over it. Warts are also caused by a virus and can spread, while corns are purely a mechanical response to pressure and are not contagious.
Why Corns Form
Corns develop when a specific spot on your foot absorbs repeated friction or pressure. Your skin responds by building up extra layers of dead cells as a protective shield. Over time that buildup compresses into the firm, cone-shaped plug that defines a corn. Shoes that are too tight, too loose, or have seams that rub against toes are the most common trigger. High heels concentrate pressure on the ball of the foot and the tops of curled toes. Going without socks removes a friction buffer. Bony foot structures like hammertoes or bunions create extra pressure points that make corns almost inevitable without proper footwear.
Signs a Corn Needs Attention
Most corns are harmless, if annoying. But a corn that becomes infected looks noticeably different. Watch for increasing redness that spreads beyond the corn itself, warmth in the surrounding skin, swelling, or any discharge of pus or fluid. Pain that worsens suddenly or doesn’t improve after you remove the source of pressure is another signal. People with diabetes or poor circulation in their feet should take any corn seriously, because reduced blood flow and nerve sensation make infections harder to detect and slower to heal.