swollen gums are there if there is plaque deposition and because of that there is gingivitis. take good oral hygeine measures like proper brushing at least twice a day with flossing. you can do warm saline rinses 2 to 3 times a day. for more information on gum diseases you can visit the following link
http://www.identalhub.com/articlesubcategories.aspx?articlecategoryid=9&name=gum%20diseases