Are there any risks to the test?There is very little risk to having a blood test. You may have slight pain or bruising at the spot where the needle was put in, but most symptoms go away quickly.A blood test from an artery is more painful than a blood test from a vein, but this pain usually goes away quickly. You may have some bleeding, bruising, or soreness at the spot where the needle was put in. Though problems are rare, you should avoid lifting heavy objects for 24 hours after the test.
