Please help! what happens during, and after the scoliosis surgery?

Varies: There are several types of scoliosis surgeries, so I certainly would discuss with your surgeon. That being said, most scoliosis surgeries involve placing some form of instrumentation into the spine which is then used to straighten the spine and hold it in a corrected position until it heals. It is not a small surgery by any means, but in a young, healthy person they can do remarkably well.