What is the name of a condition when a venipuncture site is swollen?

A condition where a venipuncture site is swollen is known as "phlebitis." This inflammation of the vein can occur due to irritation from the needle or the intravenous catheter, leading to swelling, redness, and pain at the site. If the swelling is due to fluid accumulation, it may also be referred to as "infiltration." Proper technique and care can help minimize these complications.