Hello and thank you for your question.
The Hydrogen peroxide
and salt water are great to use for traumatic ulcers and aphthous ulcers
. The hydrogen peroxide helps introduce oxygen
into the wound and gently removes any debris that may be entrapped causing increased inflammation. The salt water, due to osmosis pulls excess fluid from the wound site, shrinking the cells and removing some of the pain associated with inflammation. If the tooth is sharp it should be smoothed out by a dentist
in his/her office. If it's due to biting trauma, then give it 1-2 weeks to heal and it should go away. The tenderness should disappear about 5-7 days after formation. I would not use the cotton as a buffer because it may actually irritate the site even more. You can take ibuprofen
to help with the pain, stay away from spicy foods and alcohol.
Best Wishes and Good Health