First what pain killers were given and what was diagnosis. Need clinical examination and evaluation required to reach daignosis If not done any xrays or mri - the. U need one to do it. To reach some diagnosis Then only treatment can be planned. Have you taken physiotherpy session Whats her weight? Any history of fall or injury to lower back

Needs evaluation first.

Kindly do an xray of lumbosacral spine in orthogonal views. Apply indomethacin gel and hot compression. Review with xray.