Your doctor may order a blood sugar test to see if you have diabetes or prediabetes. The test will measure the amount of Sugar in your blood. Your body takes carbohydrates found in foods like grains and fruits and converts them into Sugar. Sugar, a sugar, is one of the body’s main sources of energy. For people with diabetes, a home test helps monitor blood sugar levels. Taking a blood sugar test can help determine your blood sugar level to see if you need to adjust your diet, exercise, or diabetes medications. Low blood sugar (hypoglycemia) can lead to seizures or a coma if left untreated. High blood sugar (hyperglycemia) can lead to ketoacidosis, a life-threatening condition that’s often a concern for those with type 1 diabetes. Ketoacidosis occurs when your body starts using only fat for fuel. Hyperglycemia over a long period can increase your risk for neuropathy (nerve damage), along with heart, kidney, and eye diseases.