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Bruise after blood test: What does it mean and how do you avoid it?

It is not uncommon to get a bruise after a blood test. A bruise occurs when blood leaks out of the vein into the surrounding tissue after the needle is removed. This can happen if the needle damages the vein, if you have fragile blood vessels, or if you are taking blood-thinning medication.

How to minimize the risk

  • Pressure on the injection site: After the test, apply pressure to the site for at least a few minutes to prevent bleeding.
  • Avoid heavy lifting: Avoid putting any strain on the arm where the sample was taken for a few hours after the test.
  • Cool the area: Apply an ice pack to reduce swelling and bruising.

When should you seek help?

If you experience pain, swelling, or discoloration that does not improve after a few days, it may be a good idea to contact a healthcare professional.

Book your blood test at Valida Health

At Valida Health, our experienced staff is trained to minimize discomfort and the risk of bruising after a blood test. We offer customized blood tests tailored to your needs, and you receive your results quickly via sundhed.dk.

Frequently Asked Questions

How can I avoid bruising after a blood test?

Apply pressure to the injection site and avoid heavy lifting immediately after the test.

When should I worry about a bruise?

If the mark does not improve after a few days, or if it is very painful, you should contact a healthcare professional.