My son suffered a seizure on Monday during which he sustained injury to his tongue. The tongue was initially very swollen and purple. His injury appears to be confined to the inside of his tongue, as no lacerations can be observed. Since Monday he has experienced great difficulty speaking and eating, and his tongue stings terribly along both sides. He has been treating it with a prescription corticosteroid dental cream for the last couple days, but as of today (Sunday) it feels no better. Is there anything else he can do to promote healing? He cannot tolerate the standard salt/baking soda mouthwash.