Blood Sugar Test A blood sugar test measures the amount of glucose (sugar) in your blood. It's a common test used to diagnose and monitor diabetes, a condition where the body cannot produce or effectively use insulin, a hormone that regulates blood sugar levels. Types of Blood Sugar Tests: Fasting Blood Sugar (FBS): Measures blood sugar levels after an overnight fast (typically 8 hours). Random Blood Sugar: Measures blood sugar levels at any time of day. Oral Glucose Tolerance Test (OGTT): Measures blood sugar levels before and after drinking a sugary drink. Why Blood Sugar Testing is Important: Detects Diabetes: High blood sugar levels can be a sign of diabetes. Monitors Diabetes: For people with diabetes, regular blood sugar testing helps manage their condition and prevent complications. Assesses Risk: Blood sugar tests can help assess your risk for developing diabetes. Symptoms of High Blood Sugar: Frequent urination Increased thirst Extreme hunger Fatigue Blurred vision Wounds that heal slowly Tingling or numbness in the hands or feet