Hi.. I hope you are talking of diabetes mellitus. Diabetes mellitus is a condition which is characterized by presence of abnprmally high blood sugars. The normal values of blood sugar is between 90mg/dl to 140mg/dl depending on the fasting state of the body. If your blood sugars are higher than these values you may be having diabetes mellitus. The symptoms of diabetes mellitus include increased thirst, increased frequency of passing urine, visual impairment, exessive eating, weight loss or inability to put on weight, wound healing impairment and when not treateb properly may result in symptoms of kidney failure and blindness. Diabetes has a genetic component, meaning genes responible for diabetes. These genes are genetically transferable. If both your parents are diabetic there are high chances that you may diabetes too. watch your diet, regular exercises and frequent monitoring of sugars can prevent diabetes and its complications... All the best..