1. Type 2 Diabetes Slideshow Pictures
2. Diabetes and Foot Problems Slideshow Pictures
3. Take the Diabetes Quiz!

Medical Author:

Melissa Conrad Stöppler, MD

Melissa Conrad Stöppler, MD

Melissa Conrad Stöppler, MD, is a U.S. board-certified Anatomic Pathologist with subspecialty training in the fields of Experimental and Molecular Pathology. Dr. Stöppler's educational background includes a BA with Highest Distinction from the University of Virginia and an MD from the University of North Carolina. She completed residency training in Anatomic Pathology at Georgetown University followed by subspecialty fellowship training in molecular diagnostics and experimental pathology.

View Full Profile

Medical Editor:

William C. Shiel Jr., MD, FACP, FACR

William C. Shiel Jr., MD, FACP, FACR

Dr. Shiel received a Bachelor of Science degree with honors from the University of Notre Dame. There he was involved in research in radiation biology and received the Huisking Scholarship. After graduating from St. Louis University School of Medicine, he completed his Internal Medicine residency and Rheumatology fellowship at the University of California, Irvine. He is board-certified in Internal Medicine and Rheumatology.

View Full Profile

In this Article

• Diabetes facts
• What is diabetes?
• What is the impact of diabetes?
• What causes diabetes?
• What are the different types of diabetes?
• Type 1 diabetes
• Type 2 diabetes
• Other types of diabetes
• What are diabetes symptoms?
• How is diabetes diagnosed?
• Why is blood sugar checked at home?
• What are the acute complications of diabetes?
• What are the chronic complications of diabetes?
• What can be done to slow diabetes complications?
• Type 2 Diabetes - Slideshow
• Diabetes and Foot Problems - Slideshow
• Take the Diabetes Quiz!
• Diabetes FAQs
• Patient Comments: Diabetes - Acute Complication
• Patient Comments: Diabetes - Causes
• Patient Comments: Diabetes - Test
• Patient Comments: Diabetes - Symptoms
• Find a local Endocrinologist in your town
• Diabetes Mellitus Index

Diabetes mellitus is a group of metabolic diseases characterized by high blood sugar (glucose) levels that result from defects in insulin secretion, or its action, or both. Diabetes mellitus, commonly referred to as diabetes (as it will be in this article) was first identified as a disease associated with "sweet urine," and excessive muscle loss in the ancient world. Elevated levels of blood glucose (hyperglycemia) lead to spillage of glucose into the urine, hence the term sweet urine.

Normally, blood glucose levels are tightly controlled by insulin, a hormone produced by the pancreas. Insulin lowers the blood glucose level. When the blood glucose elevates (for example, after eating food), insulin is released from the pancreas to normalize the glucose level. In patients with diabetes, the absence or insufficient production of insulin causes hyperglycemia. Diabetes is a chronic medical condition, meaning that although it can be controlled, it lasts a lifetime.

Over time, diabetes can lead to blindness, kidney failure, and nerve damage. These types of damage are the result of damage to small vessels, referred to as microvascular disease. Diabetes is also an important factor in accelerating the hardening and narrowing of the arteries (atherosclerosis), leading to strokes, coronary heart disease, and other large blood vessel diseases. This is referred to as macrovascular disease. Diabetes affects approximately 26 million people in the United States, while another 79 million gave prediabetes. In addition, an estimated additional 7 million people in the United States have diabetes and don't even know it.

From an economic perspective, the total annual cost of diabetes in 2011 was estimated to be 174 billion dollars in the United States. This included 116 billion in direct medical costs (healthcare costs) for people with diabetes and another 58 billion in other costs due to disability, premature death, or work loss. Medical expenses for people with diabetes ate over two times higher than those for people who do not have diabetes. Remember, these numbers reflect only the population in the United States. Globally, the statistics are staggering..

Diabetes was the 7th leading cause of death in the United States listed on death certificates in 2007.