Have they made any progress in preventing or curing the sores I get on my legs and feet?

Diabetic ulcers can quickly develop from a combination of poor blood supply, which slows healing, and reduced sensation from nerve damage, which can make you unaware of the ulcer developing. Without treatment, diabetic ulcers can lead to severe infection that can even require amputation. With treatment, the sores are highly curable. Successful treatment includes controlling blood sugar and improving blood flow, sometimes with surgery to open up the arteries.