What Causes a Vein to Blow: Understanding Vein Health and Complications? – Elite Vascular
A blown vein occurs when a needle punctures through the vein, causing blood to leak into the surrounding tissue. This can happen during procedures like IV insertion or blood draws, and is often due to fragile or damaged veins, improper needle placement, or sudden movement during the procedure. Contributing factors include dehydration, aging, frequent needle use, or underlying medical conditions that weaken vein walls. While a blown vein is usually not serious, it can cause bruising, swelling, and discomfort.
