Sameer is suffering from diabetes mellitus, a disease in which blood sugar levels remain high due to insufficient production or improper utilization of insulin hormone. Insulin, secreted by the β-cells of the islets of Langerhans in the pancreas, helps regulate glucose levels by converting excess sugar into glycogen. Lack of insulin leads to increased glucose in the blood and urine. Reducing sugar intake and regular exercise help maintain healthy blood glucose levels and control the effects of diabetes.