Acute unilateral neck swelling and sialadenitis are rare but documented causes in the differential diagnosis of acute neck swelling following surgeries performed in various surgical positions and also in critical care units. Although rare, they can lead to severe morbidity as well as mortality if not promptly addressed.We report a case of acute unilateral submandibular gland swelling detected in the immediate post operative period following Acoustic Schwannoma excision performed via retromastoid suboccipital craniotomy in park bench position, and its subsequent management.