Diabetes is a condition where the body cannot properly process glucose due to a lack of insulin or insulin resistance. There are two main types of diabetes: type 1 occurs most often in children/young adults and is caused by the immune system attacking insulin-producing cells, while type 2 accounts for 90-95% of cases and is associated with obesity and physical inactivity. Symptoms can include blurred vision, fatigue, frequent urination, and weight loss. Treatment involves lifestyle changes like diet, exercise, blood sugar monitoring, and sometimes insulin or other medications to control blood sugar levels and prevent complications. Good control is important to avoid damage to organs and tissues.