Your doctor will let you know how to prepare for blood tests.ĭuring a blood test, a small sample of blood is taken from your body. For some, you may need to fast (not eat any food) for 8 to 12 hours before the test.
Many blood tests don't require any special preparations. When you have routine checkups, your doctor may recommend blood tests to see how your body is working.
Diagnose diseases and conditions such as cancer, HIV/AIDS, diabetes, anemia (uh-NEE-me-eh), and coronary heart disease.Evaluate how well organs-such as the kidneys, liver, thyroid, and heart-are working.Specifically, blood tests can help doctors: They also help check the function of your organs and show how well treatments are working. Blood tests help doctors check for certain diseases and conditions.
