Hi, welcome to HCM.
Lower limb numbness
is due to lumbar disc herniation. However problem on hands is related to cervical disc.
These two symptoms are having different pathology.
You need to do MRI
SPINE lumbar area. It will definitely diagnose the cause of lower limb numbness.
It will better to consult board certified orthopaedician and get evaluated in details. So it help in deciding spectrum of investigations depending on severity.
Hope I have answered your query.