Canker sores and fever blisters, which are triggered by the herpes simplex I virus, are painful ulcers and lesions that develop in the mouth and around the lips. The usual course of healing takes from 10 days to 2 weeks. Soft tissue laser treatment initiated in the prodromal (tingling) or beginning stage can significantly reduce this healing time. After a 1 minute 30 second procedure that is completely painless, relief is felt as early as the next day.
