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Corns and calluses

Corns and calluses are thickened layers of skin caused by repeated pressure or friction.
  • Alternative Names

    Calluses and corns

  • Causes, incidence, and risk factors

    Corns and calluses are caused by pressure or friction on skin. A corn is thickened skin on the top or side of a toe, usually from shoes that do not fit properly. A callus is thickened skin on your hands or the soles of your feet.

    The thickening of the skin is a protective reaction. For example, farmers and rowers get callused hands that prevent them from getting painful blisters. People with bunions often develop a callus over the bunion because it rubs against the shoe.

    Neither corns nor calluses are serious conditions.

  • Symptoms
    • Skin is thick and hardened.
    • Skin may be flaky and dry.
    • Hardened, thick skin areas are found on hands, feet, or other areas that may be rubbed or pressed.
  • Signs and tests

    Your health care provider will make the diagnosis after observing the skin. In most cases tests are not necessary.

  • Treatment

    Usually, preventing friction is the only treatment needed. If a corn is the result of a poor-fitting shoe, changing to shoes that fit properly will usually eliminate the corn within a couple of weeks. Until then, protect the skin with donut-shaped corn pads, available in pharmacies. If desired, use a pumice stone to gently wear down the corn.

    Calluses on the hands can be treated by wearing gloves during activities that cause friction, such as gardening and weight lifting.

    If an infection or ulcer occurs in an area of a callus or corn, unhealthy tissue may need to be removed by a health care provider and treatment with antibiotics may be necessary.

    Calluses often reflect undue pressure placed on the skin because of an underlying problem such as bunions. Proper treatment of any underlying condition should prevent the calluses from returning.

  • Expectations (prognosis)

    Corns and calluses are rarely serious. If treated properly, they should improve without causing long-term problems.

  • Complications

    Complications of corns and calluses are rare. People with diabetes are prone to ulcers and infections and should regularly examine their feet to identify any problems right away. Such foot injuries need medical attention.

  • Calling your health care provider

    Very closely check your feet if you have diabetes or numbness in the feet or toes. If you have diabetes and notice problems with your feet, contact your health care provider.

    Otherwise, simply changing to better-fitting shoes or wearing gloves should resolve most problems with corns and calluses.

    If you suspect that your corn or callus is infected or is not getting better despite treatment, contact your health care provider. Also call your health care provider if you have continued symptoms of pain, redness, warmth, or drainage.

  • References

    Scardina RJ, Lee SM. Corns. In: Frontera, WR, Silver JK, eds. Essentials of Physical Medicine and Rehabilitation. 2nd ed. Philadelphia, Pa: Saunders Elsevier; 2008:chap 79.

    Freeman DB. Corns and calluses resulting from mechanical hyperkeratosis. Am Fam Physician. 2002; 65(11): 2277-2280.

    American Diabetes Association. Standard of Medical Care in Diabetes – 2009. Diabetes Care. 2009;32:S13-S61.

Review Date: 7/10/2009

Reviewed By: Linda J. Vorvick, MD, Medical Director, MEDEX Northwest Division of Physician Assistant Studies, University of Washington, School of Medicine; C. Benjamin Ma, MD, Assistant Professor, Chief, Sports Medicine and Shoulder Service, UCSF Dept of Orthopaedic Surgery. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- 2014 A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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