We present a case report of a patient who developed acute swelling of the tongue during anaesthesia using the laryngeal mask airway. The swelling was thought to be due to obstruction of the venous drainage of the tongue. This was associated with isolated cyanosis of the tongue and paraesthesia. The swelling and cyanosis of the tongue resolved rapidly after removal of the laryngeal mask airway. The patient suffered paraesthesia of the tip of the tongue that lasted for two weeks.
