It may also be a side effect of the medicine you are taking or even just a reaction to your An appointment with your dentist is not necessary until the swelling has been going on for longer than a week. Until then, you can see if it is a temporary thing and whether home care works. Naturally, maintaining top oral care habits is the first step in how to relieve swollen gums, although you might want to make sure that your mouthwash and toothpaste are not irritating your gums and making them swell. Plus, avoid smoking and drinking as both habits can cause swelling in your gums.