Hold a wet tea bag on a canker sore; a used tea bag contains tannic acid, a kind of astringent that helps reduce pain and inflammation and speeds up the healing process.
- You can use either a black or a green tea bag. After making a cup of tea, put the wet tea bag in the refrigerator for a few minutes.
- Press the chilled, wet tea bag gently over the canker sore for about 15 to 20 minutes.
- Do this two or three times a day until the canker sore is gone.