Corn and callus removal

What is corn and callus removal, and how does it work?

Corn and callus removal, which podiatrists call debridement (taking off thickened, hardened skin), is usually done with a sterile scalpel. A corn is cut out in a procedure called enucleation¹. Because it's simple, scalpel removal is the most common treatment for thick skin under the sole².

Corns and calluses form when your skin responds to long-term pressure or friction³. Corns are small lumps of hard skin, and calluses are larger patches of rough, thick skin⁴. Tight shoes, foot deformity and a lot of activity can all add to the pressure³. Taking off the thick skin relieves the pain it causes. In people with diabetes, it also aims to lower pressure under the sole⁵.

What is it used for, and how well does it work?

It's used for painful corns, for thick skin (callus) under the sole, and for callus in adults with diabetes.

For pain, the results are mixed. Older people with hard skin under the forefoot had more pain relief from scalpel removal than from a pretend treatment over the following week². For older people with painful calluses, pain fell a lot with or without real scalpel removal, so the extra benefit from the scalpel alone may be small⁶. Removing thick skin also lowers pressure under the treated area, though how long that lasts isn't known⁷.

In diabetes, callus is strongly linked with foot ulcers⁸, and it's recommended that callus be removed to ease pressure⁹. It isn't clear yet whether removing callus prevents ulcers.

Expect short-term relief. Corns more often than not return unless the source of the pressure is dealt with¹.

Is corn and callus removal right for me?

It suits people with a troublesome corn or callus when a trained clinician does it. Podiatrists are trained to use a sterile scalpel safely¹. They'll first check what you have, because a verruca (a wart on the foot) can sometimes be mistaken for a corn¹⁰.

If you have diabetes, heart disease or circulation problems, have a weakened immune system or are older, don't treat corns and calluses yourself, because these conditions can make foot problems more serious. See your GP or a podiatrist instead⁴¹¹. In adults with diabetes, callus should only be treated by appropriately trained foot care professionals, because it can cause harm if done badly¹². Poor blood supply also limits how much skin can safely be removed, so a podiatrist assesses it carefully⁵.

What happens during corn and callus removal?

Before starting, the podiatrist asks about your symptoms and examines the area¹⁰. If you have diabetes, they'll also check your general health, circulation and medications⁵. They should explain the risks and benefits and plan follow-up with you⁵.

Callus is usually removed with a scalpel, scissors or forceps⁵. A corn is cut out with a sterile scalpel blade¹. It's done under clean, germ-free conditions to prevent infection⁵.

There's no set number of sessions. People at higher risk, such as those with diabetes, often need it repeated⁵, so expect to return for review. A podiatrist may also suggest padding, insoles or footwear advice to take pressure off the area, and a daily foot cream or moisturiser to keep skin softer¹.

Are there any risks or side effects?

For older people with painful calluses, scalpel removal alone had no safety issues⁶. The main risks are in higher-risk feet, where treatment done badly can cause harm¹². It helps to tell your podiatrist about diabetes, circulation problems or past foot ulcers before treatment.

Afterwards, check the area for bleeding under the skin, redness, swelling or pus. The signs to act on are listed below.

How does it compare with other options?

For adults with corns, salicylic acid plasters (medicated corn plasters) shrank corns more than scalpel removal at 3 months. By 6 months, the number of corns completely gone was similar¹⁴. For callus under the sole, podiatry treatment and topical (skin-applied) treatments gave similar results after 21 days, and people in every group felt better¹⁵.

Padding, insoles and footwear advice deal with the cause of the pressure, which lowers the chance of a corn returning¹. For older people with painful calluses, scalpel removal alone had minimal effect, but combining it with padding may add worthwhile benefit⁶. For a mild corn or callus, it's reasonable to start with these steps and a daily moisturiser before having anything removed.

If you have diabetes, avoid corn plasters and chemical removers¹².