Corns are hardened bumps or rough patches of skin on your feet, that are sensitive to touch or cause pain. Corns are one of the most common foot ailments [1]. They are the result of increased production of keratin as your body’s protective response to prolonged or repeated friction or pressure. That’s why corns usually appear on typical pressure spots and why certain people are more prone to developing them than others.
Some risk factors for developing corns are related to your body and might be genetic or are acquired by, for example, trauma or ageing. These include foot abnormalities such as flat-footedness, abnormal gait or deformities like bunions and hammer toe as well as low skin elasticity (e.g. due to age).
Other risk factors are related to your activity. People with jobs that require a lot of time on their feet (e.g. nurses, waiters or cabin crew) are at a higher risk of developing corns.
One of the most prominent risk factors we can control, however, is the choice of footwear. We too often choose our shoes by appearance and do not pay enough attention to a good fit and comfort.
Treatments can help resolve the corn in around 2-4 weeks, but generally, they return if the source of pressure causing it remains. Therefore, it is important to find the source of the pressure and avoid it.
This is most often achieved by simply changing to more comfortable footwear or using padding (moleskin or adhesive pads available in pharmacies) until new shoes are broken in. In some cases, insoles might help.
Only in rare cases, medical intervention is required.
Here are some general tips on how best to prevent corns, without having to give up your favourite activities or your job:
Small corns generally require little to no treatment and usually go away by themselves if you avoid the pressure causing them. If your corn causes irritation or pain, there are several ways to relieve the pressure and treat the corn. When treated, corns usually take about two to four weeks to disappear. In all cases, taking care of your feet, washing and drying them well and moisturising them regularly helps.
Please note, that if you have insensitive skin due to poor circulation, diabetes or nerve damage, you should consult a chiropodist before treatment.
Following the treatment, the dead skin will turn white and can be filed away. These treatments should only be used cautiously as the salicylic acid might irritate the surrounding healthy skin and should not be used on cracked corns.
If you have diabetes or poor circulation, you should avoid these treatments, or consult your doctor or chiropodist before any treatment.
When treated, they usually take about two to four weeks to disappear.
Although corns are not serious, they can cause irritation, inflammation or even ulceration. If you experience severe inflammation or pain, you should seek medical advice.
If you are unsure if what you have is a corn, you are advised to consult a doctor or other appropriate healthcare professional.
Frequently reappearing corns might be caused by foot abnormalities, such as deformities, structural abnormalities of the bones, poor bone alignment or an abnormal gait. If you are concerned by their frequency or persistency, you might want to visit a doctor or podiatrist in order to rule out or detect any of these underlying causes. In these cases, a specific padding or shoe insert might help you to prevent corns from reappearing. In rare cases, surgery might be necessary.
https://www.mayoclinic.org/diseases-conditions/corns-and-calluses/symptoms-causes/syc-20355946
https://www.aad.org/public/everyday-care/injured-skin/burns/treat-corns-calluses
https://www.apma.org/Patients/FootHealth.cfm?ItemNumber=1346
https://www.mayoclinic.org/diseases-conditions/corns-and-calluses/symptoms-causes/syc-20355946
https://www.aad.org/public/everyday-care/injured-skin/burns/treat-corns-calluses
https://www.apma.org/Patients/FootHealth.cfm?ItemNumber=1346
Dunn JE. Prevalence of Foot and Ankle Conditions in a Multiethnic Community Sample of Older Adults. American Journal of Epidemiology 2004 ; 159 : 491–498.