The blood test will help doctors learn many things about your body and your health.

Before the blood test, you may be asked not to eat anything. You will be allowed to eat after your tests are done. The blood test requires that the trial nurse to put a needle in your arm for a few minutes to take a small amount of blood.  It may sting a little bit and sometimes a medicine can be put on your arm before the blood test so that you don’t feel the needle.