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could mean possible pressure on the nerve
- locally or from Lumbar Spine
The best approach will be to see a neurologist
- to see whether it is a nerve or root of the nerve / what is the possible cause and so on.
Considering your young age, some minor deformity
or defect in the spine could be causative. MRI of the spine may be necessary.
After all, we have to sit long hours - even if not working.... Better to be sure than be guessing.
It sounds like a simple problem, amenable for an easy solution - but a proper diagnosis is a must and the neurologist will help.
Wishing you speedy recovery