What is Diabetes?

Diabetes is a common group of chronic metabolic diseases that cause high blood sugar (glucose) levels in the body due to defects in insulin production or function. Diabetes is also known as diabetes mellitus to distinguish it from a relatively rare metabolic disorder called diabetes insipidus that doesn't affect blood sugar. Symptoms of diabetes occur when a lack of insulin or insulin resistance stops glucose from entering the cells and fueling and energizing the body. The resulting spike in glucose can result in symptoms such as increased hunger and thirst, weight loss, fatigue, and frequent infections. Long-term complications include kidney failure, nerve damage, and blindness.