I just found this board about 3 weeks ago. My 13 year old DD developed a verbal tic. The was saying "Tuh" like 4-7 times a minute. I asked one of her teachers about it and she said she wasn't doing it in class. When observing DD with friends, she wasn't doing it all that much..hardly noticeable. It was driving us nuts at home.
After finding this board, I put her on a magnesium/calcium supplement, started giving her Epsom salt baths. Last week I took her to a hypnotherapist and her verbal tic was gone within a couple of days. I posted about it last week. The therapist worked on relaxation techniques. But now she has started doing a yawning, nose crunching thing, but it's not frequent. I'll take that ove rthe verbal tic any day. She also has severe seasonal allergies and I just put her on nasonex.
When talking to a adolescent Dr. friend who told me about meds. But since she was only doing it at home, we weren't going to go that route. I know it may sound flaky and a bit weird, but the hypnotherapy really seemed to help. I thought it would be good even if it didn't help the tic, but to help her relax.
Anyway, good luck. LIke I said, my DDs tic came on suddenly and seems to have left suddenly. I hope it's the same thing for you. The most important thing is to relax and don't make her feel bad about it. Pretend it doesn't bother you. When my DD was ticing, if we just pretended it didn't bother us, she didn't get all upset about it or feel bad.
Heather M