This may be degenerative disc disease.
For final diagnosis it will be better if you go for MRI LUMBOSACRAL spine .
Till that -
AVOID sudden forward bending , weight lifting .
Next Steps
do hot water fometation 10 mn 2 TIMES A DAY...
Health Tips
please consult Orthopaedic doctor nearby you or through online consultation
thank u
Dr Rajeev Munde