Blood sample from a vein
There is very little chance of a problem from having a blood sample taken from a vein.
- You may get a small bruise at the puncture site. You can lower the chance of bruising by keeping pressure on the site for several minutes.
- In rare cases, the vein may become swollen after the blood sample is taken. This condition is called phlebitis. You can use a warm compress several times daily to treat this.
- Ongoing bleeding can be a problem for people who have bleeding disorders. Aspirin, warfarin (Coumadin), and other blood-thinning medicines can make bleeding more likely. If you have bleeding or clotting problems, or if you take blood-thinning medicine, tell your doctor before your blood sample is taken.
Blood sample from a heel stick
There is very little chance of a problem from having a heel stick. A small bruise may develop at the site.
There are no risks linked with collecting DNA from saliva, urine or semen.
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