My 12 year old daughter's hips are different to each other.her right hip is a bit higher. is there anything to worry about? is it scoliosis?

Yes & could be. : If scoliosis is going to worsen, it usually does so during the rapid growth spurt of puberty. Her GP can examine her & refer her to a Pediatric Orthopedist to follow her clinically & with X-rays of the spine to monitor degree of curvature & rotation, if present, every 6 mos. & check for limb (leg) length discrepancy & other abnormalities. They'll need her symptoms & family history of scoliosis