Injuries to the soft tissues, which include the tongue, cheeks, gums, and lips, can result in bleeding. To control the bleeding, here's what to do:
Rinse your child’s mouth with a mild salt-water solution.
Use a moistened piece of gauze or tea bag to apply pressure to the bleeding site. Hold in place for 15 to 20 minutes.
To both control bleeding and relieve pain, hold a cold compress to the outside of the mouth or cheek in the affected area for 5 to 10 minutes.
If the bleeding doesn't stop, see your dentist right away or go to a hospital emergency room. Continue to apply pressure on the bleeding site with the gauze until your child can be seen and treated.