A neurogenic ulcer begins with thickening and a callus on an area of pressure, as seen on the left on this foot, followed by skin breakdown (an ulcer), as seen on the right. The toes can also be affected by neurogenic ulceration; the dark color is due to bleeding into the area of pressure and callus. This neurogenic ulcer has occurred on a common pressure area, the ball of the foot near the great toe.
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Diabetic Ulcer (Neurogenic Ulcer)  Information for adults

Picture of Diabetic Ulcer (Neurogenic Ulcer): A neurogenic ulcer begins with thickening and a callus on an area of pressure, as seen on the left on this foot, followed by skin breakdown (an ulcer), as seen on the right. Divider line
A neurogenic ulcer begins with thickening and a callus on an area of pressure, as seen on the left on this foot, followed by skin breakdown (an ulcer), as seen on the right.
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Overview
Neurogenic ulcers, also known as diabetic ulcers, are ulcers that occur most commonly on the bottom of the foot. People with diabetes are predisposed to peripheral neuropathy, which involves a decreased or total lack of sensation in the feet. Feet are naturally stressed from walking, and someone who has decreased sensation will not necessarily feel that they have an area of skin breakdown occurring. Coupled with this lack or absence of sensation is a decrease in circulation to the feet as well. Wounds that do not get proper blood flow are not only slower to heal but also at an increased risk for infection. A small cut, scrape, or irritated area in a diabetic can turn into an ulcer for these reasons. It is common for these types of ulcers to keep coming back in diabetics.
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Last Modified: 22 Dec 2008
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