Diabetes may be a disease that happens when your blood sugar , also called blood glucose , is just too high. blood sugar is your main source of energy and comes from the food you eat. Insulin, a hormone made by the pancreas, helps glucose from food get into your cells to be used for energy. Diabetes may be a chronic condition related to abnormally high levels of sugar (glucose) within the blood. Insulin produced by the pancreas lowers blood sugar . Absence or insufficient production of insulin, or an inability of the body to properly use insulin causes diabetes. Diabetes may be a condition that affects blood glucose levels and causes many serious health problems if left untreated or uncontrolled. there's no cure for diabetes, but it can enter remission. People can manage it with medication and lifestyle changes.