April 28, 2025
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We answer from the perspective of science: why does our arm turn blue after donating blood?

  • December 12, 2024
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This is what we do not always experience bruiseWhy does it appear sometimes and not at all other times? Answer Let’s get you down for… The main reason

We answer from the perspective of science: why does our arm turn blue after donating blood?

This is what we do not always experience bruiseWhy does it appear sometimes and not at all other times?

Answer Let’s get you down for…

The main reason is actually that our veins get damaged during blood donation.

arm bruise

under the skin damage to capillaries by the needlecan cause such bruises. In such a case, the blood leaks from the vessel and spreads to the surrounding tissues, causing bruising. Especially if more than one attempt has been made, bruising becomes a must.

Of course in addition capillaries are too close to the skin surface there is. After insertion of the needle, these small vessels can be damaged very easily. After this damage, the blood spreads to the tissue.

In some people, the blood can clot for a long time.

bruise on the arm

blood clotting The process is not the same for everyone. This situation can also cause the blood to spread too much in the tissue and cause bruising. In other words, a vein damaged by a needle does not always cause this bruise.

We also always hear that we have to press the cotton swab after donating blood. If enough pressure is not applied to this area, blood will continue to leak from the vein. bruise paves the way for its formation.

Besides all these reasons personal factors also plays a role. If you are taking blood thinners or if your skin is very sensitive, bruising may be unavoidable.

Sources: healthline, ivwatch

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Source: Web Tekno

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