Diabetes Mellitus Type-II is a lifelong disease where the body does not properly use insulin to regulate blood sugar levels. Over time, high blood sugar can damage organs like the heart, kidneys, eyes, and nerves. Type-2 diabetes is usually caused by a combination of genetic and lifestyle factors like weight and diet. It is diagnosed through blood tests measuring glycated hemoglobin and fasting plasma glucose levels. Treatment involves medications, lifestyle changes like diet and exercise, and possibly surgery, to manage blood sugar and prevent complications.