Removing a corn: what works at home – and when to see a podiatrist
A corn (medical term: clavus) is a small, round area of hardened skin with a hard core. The core grows inwards and presses on the tissue beneath with every step – which is why a corn hurts so much despite being so small. Typical spots are the tops of the toes, the spaces between the toes and the ball of the foot.
In short: A superficial corn can be softened at home and the hard skin around it removed. Cutting out the core itself, on the other hand, is a job for podiatrists. And unless the cause – usually pressure from shoes – is dealt with, it will come back.
Corn, wart or callus?
| Corn | Wart | Callus | |
|---|---|---|---|
| Appearance | round, small, with a glassy core in the centre | rough surface, often with tiny dark dots | thickened skin over a wider area, without a core |
| Pain | when pressed from above | rather when squeezed from the sides | usually painless |
| Cause | pressure on one point | viruses, contagious | pressure and friction over a wider area |
If you are unsure whether it is a wart, do not treat the area with instruments – warts are contagious and belong in a doctor's hands.
Removing a corn – step by step
- Soften. A warm foot bath of about ten minutes softens the hard skin. Then dry the feet thoroughly.
- Remove the hard skin around it. Use a callus rasp or a glass or ceramic file to carefully reduce the hardened skin around the corn. Always work in one direction and only take off as much as you can without pain.
- Soften the core. Corn plasters from the pharmacy usually contain salicylic acid. They soften the core over a few days so that it comes away more easily after another foot bath. Follow the package leaflet – such plasters are not suitable for people with diabetes or circulatory disorders.
- Relieve the pressure. A ring-shaped corn pad or a toe protector cap takes the pressure off the area until it has healed.
- Care. A foot cream with urea keeps the skin supple and slows down the formation of new hard skin.
What you should not do: cut into the corn with a razor blade, scissors or a knife. The core sits deeper than it looks, and small injuries on the foot easily become inflamed.
When you should see a podiatrist
- with diabetes, circulatory disorders or reduced sensation in the feet
- if you take blood thinners
- if the area is red, swollen or inflamed
- if the corn sits deep, hurts a lot or keeps coming back
In a podiatry practice, the core is removed under direct vision with a scalpel or a bur – quickly, cleanly and usually with little pain. You will find the instruments for this in our range under Scalpels & blades and Burs & sanding caps for foot care; they are intended for professionals.
Removing the cause
A corn is the skin's way of protecting itself against pressure. As long as the pressure remains, it keeps growing back. The most common triggers:
- shoes that are too tight or too pointed, high heels
- toe deformities such as hammer toes or hallux valgus
- seams or hard edges inside the shoe
Comfortable shoes with enough room for the toes, padding at the pressure point and, with deformities, suitable insoles are therefore the most important prevention.
And calluses?
Calluses have the same cause, but cover a wider area and have no core – usually on the heel and the ball of the foot. They are easy to remove at home with a callus shaver or a callus rasp. How to go about it and which tool suits which purpose is explained in the guide Removing hard skin: shaver, rasp or file?
Frequently asked questions
Can you remove a corn yourself?
Superficial corns can be softened at home and loosened with corn plasters. Deep-seated or painful corns, and all cases involving diabetes, belong in podiatric treatment.
How long does it take for a corn to go away?
With corn plasters, the core usually comes away after a few days. Without relieving the pressure, however, the corn often comes back.
How can I tell it apart from a wart?
A corn has a glassy core and hurts when pressed from above. A wart has a rough surface, often with dark dots, and hurts rather when squeezed from the sides.
Why does my corn keep coming back?
Because the pressure that causes it is still there – usually from shoes that are too tight or a toe deformity. Only once this cause has been removed will the area stay clear for good.
Note: This guide does not replace advice from a doctor or podiatrist.
