My firl friend has been wearing braces for almost two years now. The angst and soreness and pain days are numbered. But it seems that every time the dentist tightens the braces(like once a month), her mouth is extremely sore for the first day and a half. She does rinse with warm salt water, but can't chew properly and even bites her tongue during that 1 1/2 day hell. Anyone get suggestions to minimize the discomfort?