welcome to HealthcareMagic
is pain in back of leg due to nerve root compression
in lumbar or sacral spine region.Since you have consulted a Ortho Surgeon i guess he advised MRI
to know the exact place of nerve root compression and the extent of it so that he can decide with the further treatment.She might be taking painkiller so along with that she can take multivitamins and some hot fomentation.If that does not help her then she may need to go in for traction which will be non surgical treatment
and if the extent of nerve compression is more then the Ortho surgeon may even advise surgery but better first discuss non-surgical options she should get relief with even traction.