A vein "blows" or ruptures because of damage during needle insertion. According to the provided reference, this occurs when the needle punctures or irritates the vein, leading to mild and temporary damage.
Common Causes of a Blown Vein
The reference details that the following issues can interfere with needle insertion and result in a blown vein:
- Movement: Even slight movement of the person receiving the injection while the needle is being inserted can cause the vein to rupture.
In summary, a blown vein is typically the result of physical trauma to the vein wall caused by needle insertion.
