Why is it harder to find veins for injection on someone who’s feeling nervous about it ?

Question

I was given an injection with a baby needle on my elbow pit. The nurse had to switch veins 4 times (twice in left arm, twice in right arm) and still didn’t manage to give me the injection. I was told it was because I felt nervous so it made my veins “disappeared”. How is that possible ?

In: Biology

Answer 1

I was not at all aware of this, ive been a blood donor since i was 18 years old and my veins are very easy to find, they have never missed even once.

Here is a possible reason, when you feel stressed the body increases the blood pressure to increase blood flow by somewhat collapsing the veins to increase blood pressure.