Hello, Thanks for the query, Swellin on face and tongue is not a good sign .Well this a kind of medical emergency . Because it an cause breathing problems which can be life threatening This condition can also be called angioedema Basically hives is body s response to external stimuli that is allergen , if you know what exactly causing this hives completely avoid it . Continue taking medicines prescribed by ER last night and keep applying cold compresses. . You should immediately visit ER for proper treatment . For severe hive or angioedema outbreaks, an injection of epinephrine (adrenaline) or a cortisone medication may be needed. Wishing you a good health. Thank you Dr Harry Maheshwari