The anterior facial vein
) commences at the side of the root of the nose
, and is a direct continuation of the angular vein
where it also receives a small nasal branch. It lies behind the facial artery
and follows a less tortuous course. It receives blood from the external palatine vein before it either joins the anterior branch of the retromandibular vein
to form the common facial vein
, or drains directly into the internal jugular vein
From its origin it runs obliquely downward and backward, beneath the Zygomaticus and zygomatic head of the Quadratus labii superioris, descends along the anterior border and then on the superficial surface of the Masseter, crosses over the body of the mandible, and passes obliquely backward, beneath the Platysma and cervical fascia, superficial to the submaxillary gland, the Digastricus and Stylohyoideus.
The facial vein has no valves, and its walls are not so flaccid as most superficial veins.