ROBERTO A. PENNE-CASANOVA / SCIENCE PHOTO LIBRARY ROBERTO A. PENNE-CASANOVA / SCIENCE PHOTO LIBRARY
Diabetic foot ulcer with tunnelling and maceration. If a wound has channels leading to other areas beneath the skin, where tearing and damage has occurred, it is said to have tunnelling. Tunnelling can cause the healing process to take longer and is difficult to detect. Maceration is when the area around a wound retains too much moisture causing it to soften and turn white.
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