Follow the course of medication that dentist gave. Apart from this you should try some home remedies like aloe-vera juice. Also put  a  cup of uncooked rice in a cloth tie it off and heat it and apply on the swelled area. Eat soft foods for the next several days, and not open your mouth more than you have to. Cut bananas, apples, whatever you're going to eat into thin slices, then slide them thin-ways into your mouth so you barely have to open it. Soup is much better option...for more info visit the link...http://www.identalhub.com/dental-knowing-all-about-dental-pain--539.aspx