After getting the Root Canal Treatment, it is normal to have some swelling and pain especially you had single sitting Root Canal Treatment. This swelling should go maximum within a week. If it does not go or start receding even after a week of getting treatment, then you can visit your dentist for the same. You dentist must have precribed you meds to take care of this. Follow all instructions of your Endodontist for faster recovery. For more info on root canal and its post operative instructions you can read th following link in our website http://www.identalhub.com/articlecategory-root-canal-therapy-17.aspx