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1.There is a disc between the
vertebral bodies helps as a
shock absorber effect, the disc contains maximum percentage of water, due to degenerative changes when the water content / hydration is lost the disc slips / bulges.
2.In your case there is bulge at L4-5 causing pressure effect on the bilateral neural foramen and
nerve root.
3.The normal curvature is lost due to the
muscle strain caused by the pain due to the nerve compression.
4.In this case the treatment will be back exercise followed by the
physiotherapy - in your case exercise will be enough.
5.In the last stage when not responding to the treatment, operative / interventional procedure id treatment of choice. Good luck.
Hope i have answered your query.
Any thing to ask do not hesitate
http://doctor.healthcaremagic.com/doctors/dr-ganesh/62888 Thank you.