Scoliosis typically doesn't worsen once you are past your growth years, which is after 23 or 24 years. Most people with idiopathic scoliosis typically do not need treatment, although they should get checkups every 6 months. If you are still growing, the doctor might recommend a back brace to prevent further curving. Read on about this from www.ncbi.nlm.nih.gov/pubmedhealth/PMH0002221/.
as far as i know, all depends on our age ! if you are younger than 24 years old, it can get worse, i mean in the degree of the Sciliosis. but if you are older, i don't thing the degree of the curve would increase but your back might hurt you by time. Check the doctor, they give you some exercises which you can do at hom the strengthen your back muscles and might help you in your case.