As you have lower back pain,numbness in legs so there may be possibility of Lumbar radiculopathy (the compression of lumbar nerves L4 or L5 or sacral nerves).
You need to undergo X-ray/MRI of Lumbosacral spine to rule out the possible cause.
The line of treatment may include
Nonsteroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen.
Physical therapy like deep heat ,traction,interferential therapy.
Continue to do gentle massage with muscle relaxant ointment and apply warm compresses on affected area.
Even take some Vitamin B complex supplement.
I suggest you to consult your nearby Orthopedist for further evaluation and management.
I hope this helps.
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