Title: Blood tests  - NHS
Headings: Overview
Coronavirus (COVID-19)
Overview
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Blood tests
Blood tests have a wide range of uses and are one of the most common types of medical test.
Preparing for a blood test
What happens during a blood test?
After the test
Blood test results

Content: The syringe is used to draw out a sample of your blood. You may feel a slight pricking or scratching sensation as the needle goes in, but it shouldn't be painful. If you don't like needles and blood, tell the person who is taking the sample so they can make you more comfortable. When the sample has been taken, the tourniquet will be released, and the needle will be removed. Pressure is applied to the skin for a few minutes using a cotton-wool pad. A plaster may be put on the small wound to keep it clean. After the test
Only a small amount of blood is taken during the test so you shouldn't feel any significant after-effects. However, some people feel dizzy and faint during and after the test. If this has happened to you in the past, tell the person carrying out the test so they're aware and can help you feel more comfortable. After the test, you may have a small bruise where the needle went in.