Hello,
Lower
back pain that's radiating down towards knee likely indicates issue related to
nerve compression in the
lumbar spine.
There are different reasons for it like trauma, accidental
injury to the back, due to degeneration of the discs.
I would suggest you get an MRI spine done to find out the exact cause behind the pain.
Take the scan reports to your doctor and once the cause is known, your doctor will guide you further on pain management with appropriate medicines.
If necessary he might ask you to get some other diagnostic tests to know the underlying cause.
Till then I suggest you take rest and painkillers like
ibuprofen might give some relief from pain. Visit your doctor as soon as possible.
Hope I have answered your query. Let me know if I can assist you further.
Take care
Regards,
Dr Manisha Auradkar, General & Family Physician