Diabetes mellitus( type 2) patients can still produce insulin, but their pancreas have made too little insulin at one time, or the sensitivity of the insulin is low or insulin resistance. High blood sugar level is found. If patients are not treated properly for years. It will cause severe problems such as disability or early death.Type 2 diabetes is usually discovered after middle age and symptoms develop gradually. It is always diagnosed after having high sugar level in blood and urine.