Gargle with calendula tea or goldenseal tea to help canker sores heal. Let this mixture steep for ten minutes. Strain it so that there is no herb left in the liquid. Use this tea as a mouthwash three or four times daily. Myrrh contains high amounts of tannins.
Powdered myrrh is useful for the treatment of mild inflammations of the mouth.
Myrrh had been used as a traditional remedy for mouth and gum irritations. Some herbalists suggest mixing 200-300 mg of herbal extract or 4 ml of myrrh tincture with warm water and swishing it in the mouth two to three times per day. Alternately, you can open a capsule and dab a little directly on the sore. Try placing a spent tea bag on your canker sores. This plant got its name because of its traditional use as a treatment for canker sores.