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What Are Pressure Ulcers of the Foot?

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Force or friction against the bottom of your foot causes the skin to thicken, forming a callus. If the skin keeps thickening, the callus presses up into the foot. This kills healthy tissue and causes pain. Unfortunately, you may not notice the pain if you have neuropathy, a health problem that limits how much feeling you have in your feet. Diabetes is a common cause of neuropathy. As healthy skin dies, an ulcer forms. Ulcers may progress from hot spots to infected wounds very quickly.

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Hot Spots

Red “hot” spots on the skin are signs of pressure or friction. They are a warning that you need to take care of your feet. If pressure is not relieved, a hot spot is likely to blister. Left untreated, a blister can turn into an open wound or a corn (thickened skin on top of the foot) or callus.

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Ulcers

If a corn or callus presses into the foot, it destroys inner layers of skin and fat. Cracks and sores may form. These open wounds are ulcers. They provide a way for infection to enter the body. In some cases, dead skin (such as a corn or callus) may cover an open wound, making it harder to see.

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Infected Ulcers

If bacteria enter the ulcer, infection sets in. This causes more healthy tissue to die. The infected ulcer may begin to drain. The discharge may be white, yellow, or greenish. Some infected ulcers bleed or have a bad odor. The skin surrounding an infected ulcer may become red or warm. If you think you have an infected ulcer, call your doctor right away.

 

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