Minor hair loss is a normal part of the hair-growing cycle. Each hair lives about 4.5 years, falls out and is replaced in about six months. If your hair is falling out in clumps, certain lifestyle practices or changes may be to blame, but consult a physician to rule out underlying medical conditions.
Blood draw: Removal of blood, usually by venipuncture (phlebotomy, venous blood sampling). Common term for blood sampling for laboratory analysis.
During a blood test, a small sample of blood is taken from your body. It's usually drawn from a vein in your arm using a needle. A finger prick also might be used. The procedure usually is quick and easy, although it may cause some short-term discomfort. Most people don't have serious reactions to having blood drawn.