If gums whiten or sting, eliminate gel, rinse
https://www.instapaper.com/read/2003725011
If gums whiten or sting, remove gel, rinse, and apply vitamin E oil; lower gel volume next time and make sure trays aren't striking soft tissues.
If gums whiten or sting, remove gel, rinse, and apply vitamin E oil; lower gel volume next time and make sure trays aren't striking soft tissues.