Does it hurt when you go for a blood test and they miss the vein?

Missing the vein during a blood test can result in pain, discomfort, and bruising. When a healthcare professional attempts to draw blood, they typically select a vein that is visible and prominent, usually on the inside of the elbow or the back of the hand. If the healthcare professional misses the vein and instead inserts the needle into the surrounding tissue or skin, it can cause discomfort and pain. The needle can damage the surrounding tissues and blood vessels, leading to bruising, swelling, and discomfort. In some cases, missing the vein can also result in a hematoma, which is a collection of blood outside the blood vessels, causing a lump or bump to form under the skin. To avoid missing the vein, healthcare professionals are trained to use proper techniques, palpate the vein, and ensure correct needle insertion under the skin.