There is very little chance of problems from having blood drawn from a vein. You may get a small bruise at the site. You can lower your 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 problem is called phlebitis. You can use a warm compress several times a day to treat this.
Ongoing bleeding can be a problem for people with 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 the doctor before your blood is drawn.
|By:||Reference Healthwise Staff||Last Revised: Reference June 2, 2011|
|Medical Review:||Reference Sarah Marshall, MD - Family Medicine
Reference Kirtly Jones, MD - Obstetrics and Gynecology