The control of DM depends on the blood sugar and urine sugar estimation periodically. GTT is not to be done routinely in DM patients. Urine sugar and its value as a factor of clinical help is analyzed. In the same way with blood sugar estimation. Renal glycosuria is a condition to be remembered. The time of blood sugar estimation in various sub groups varies. Random blood sugar in the evening is a useful tool for deciding the control and is new information. By doing the tests at proper time, the control can be planned effectively in diabetic patients.