Complications from blood tests?
- Sometimes a bruise develops where the needle was inserted. This is much less likely to happen if you press over the site with cotton wool for several minutes with your arm left straight (not bent).
- As with any wound, an infection may develop where the needle was inserted. See your doctor if the wound site becomes red and inflamed.
Rarely, some people feel faint during a blood test. Tell the person doing the test if you feel faint, as you should immediately lie down to prevent fainting