this is a condition known as slipped disc
syndrome which causes nerve root compression
at that site mostly. so, go for further investigations like x-ray, MRI and CT scan of affected site and consult an orthopaedician. Take complete bed rest
on firm bed for 1 month, hot fomentation to the site twice a day avoid bending and twisting and lifting weight and also sitting for long periods. Take tab ibuprofen+ paracetamol
bd and tab pan 40 once every morning before meal.
hope this will help you, take care.