The Importance Of Conducting A Blood Sugar (F, PP) From The Best Clinic The blood sugar is a procedure that tests the levels of glucose or sugar present within your blood. The test is suggested by the doctor to help diagnose diabetes, and individuals suffering, from diabetes, can use this test to manage the condition properly. With the help of blood sugar tests, you will get immediate results and will let you know whether you or diet or exercise routines need to change and if the blood sugar levels are low or high.