Although very rare, this potential complication after unilateral IJV ligation should be kept in mind. Magnetic resonance venogram (MRV) is the investigation of choice to ascertain the underlying etiology. Conservative management should be started immediately. Surgical options are reserved for patients with progressive symptoms. © 2016 Wiley Periodicals, Inc. Head Neck, 2016 © 2016 Wiley Periodicals, Inc. Head Neck 38:E2475-E2478, 2016.