How is his weight gain? My son (who's now 3) also has a short frenulum. After he was born, the LC recommended having it cut. The ped said to wait because they usually stretch. We didn't have it cut, and it has stretched some. He never had a problem nursing, it didn't cause me pain. If you are still having pain, and his weight gain isn't what it should be, I would consult an ENT.
Follow Mothering