Definately physiotherapy can work .. back & core strengthening exs vl help ur mom.
TENS Machine that is nerve stimulation vl reduce her radiating symptoms. Other many manual exs & machines r there vl work out. Need to check her daily activity habits, posture, walking pattern, etc
Next Steps
visit a good physiotherapist nearby ur house .. if u stay in or near mulund , u r welcome for session..
Health Tips
avoid weight lifting , avoid forward bending, avoid sitting with hanging legs..