I have scoliosis, which progressed unusually rapidly (the benchmark is 1 degree per year), and had the fusion surgery at age 13.
Can it ever be corrected?
There are a number of treatments out there, the most drastic (but also effective) of which is surgery. 20 years down the line and I don't normally have any pain unless I do lots of outdoor heavy work in cold weather. Good job I'm not a farmer or bricklayer. I've heard plenty of stories of people suffering their way through braces for a couple of years and needing surgery anyway; I wouldn't want to force a brace on a teenage girl if at all avoidable.
Does anything cause it?
Sometimes it's idiopathic (no known cause), though in my case it was labelled that and it turned out many years later that I have osteogenesis imperfecta (brittle bone disease) which should really have been noticed at the time by the orthopaedic surgeon...! There's a long list of conditions that can cause scoliosis - several connective tissue disorders, cerebral palsy, rickets and others
It is not caused by bad posture, heavy bags or anything like that.
Will she have to have physio.. where does it end ie her totally hunched over?
If she gets away with just needing physio, consider yourselves very lucky. Yes, it will keep progressing (speed is the key question). I have heard of curvatures over 100 degrees (mine was 85). Apparently over 50 degrees they start looking at surgical options.
If you do go private for a first appointment, I would make sure that this is with someone who is also practicing locally as an NHS paediatric orthopaedic surgeon. You will need to get yourselves back into the NHS system for treatment as (though physio is fairly affordable) you'd pretty much have to be a Rothschild to afford the surgery.
We are in limbo waiting and it seems to be getting worse
You may like to contact the Scoliosis Association who have a free helpline and will be much more up to date than I am sauk.org.uk/