The right external jugular vein has a somewhat direct line with the internal jugular veins, making it often easier to assess the pulse contour and the blood pressure in the thoracic vena cava (known as venous pressure). The parotid gland is where the external jugular vein starts. It’s formed where the posterior auricular vein and the retromandibular vein’s posterior separation meet. This vein gets the majority of the blood from the cranium’s exterior and the face’s deeper portions. The subclavian vein receives the external jugular vein’s drainage.