I have lost roughly 5 kilos lately (i am 1,85 cm tall and weight 80 kilograms). also i have been found to have high blood sugar. what could it be?

High blood sugar: Your Primary doctor MUST help you control your diabetes! Your goal should be to rid yourself of diabetes. Yes it can and should happen if you carefully control your blood glucose levels. It might take some time but that should be your goal. Check your blood sugar on alternate mornings (pre-breakfast) and evenings (bed time). Keep control of your diet.