Can motrin help with scoliosis pain?

Yes. But so can most any pain reliever so check with your doctor to see which is best for you.
Yes in several cases. Typical or idiopathic scoliosis is a painless spine deformity but if large it may cause muscular pain & if it extends into the lower back it can accelerate degeneration there & Motrin may help. Sometimes a scoliosis develops due to degeneration in the lower back & Motrin may help, again. Sometimes a scoliosis can develop from a benign bone tumor that responds to Motrin or from disc herniation.