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DUCorns, callus and bursae are often misunderstood. They are not simply problems to remove, they are protective responses from the body.
A bursa forms deep within the tissue as a cushioning mechanism to protect bone and soft tissue from excessive pressure. It develops in response to stress and helps prevent damage.
Callus forms at the surface due to friction and pressure. It thickens the skin to act as a natural barrier.
When pressure becomes more intense, the body produces a corn. A corn is highly concentrated keratin, similar in structure to nail, forming a dense plug that protects the underlying tissue from breaking down into an ulcer.
These three can exist at the same time, working together as a hierarchy of defence to prevent tissue breakdown.
The key issue is not their presence, but the cause. If pressure, footwear or biomechanics are not addressed, they will continue to develop.
In patients with reduced sensation, such as neuropathy, these protective mechanisms may not form effectively. This increases the risk of ulceration.
The foot is constantly adapting to protect itself. Understanding these changes is essential to treating the cause, not just the symptom.
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