Patients with diabetes are prone to the development of foot ulcers. After years of elevated blood sugar, both nerves and small blood vessels in the feet are damaged. Patients therefore do not feel small injuries that occur, and damage to the circulation predisposes people to the development of wounds that may not heal. Diabetes also affects the immune system, leading to an increase chance of infection of foot ulcers.
This would normaly be seen and treated in a specialist diabetes care unit. Ulcers can form on the feet of people with diabetes, usually after an injury or in places that receive constant pressure, such as the ball of the foot. Further testing can be done to assess the circulation of the foot, and to determine the extent of the loss of sensation.