You might want to read the post MVD surgery diary at the top of this forum. Ella wrote about her surgery experience.

I had one about 3 and a half years ago. I'd tried medications which worked for awhile and I had tried two of the outpatient surgeries. One worked for several years and the other different procedure only worked for a few weeks. So I finally had the MVD. I was in the hospital for several days and had some bad headaches that continued when I went home. And i was very tired for a week or so. I tapered slowly off the medications I had been on. I have been fine ever since. I worry about the pain returning and sometimes I have some very minor soreness in the area of the surgeries.

I hope all goes well for your daughter and that she is pain free when it is over.