Cramps can have multiple reasons
Calcium deficiency
Vitamin E deficiency
Less blood flow
Cold at night.
Nerve conpression usually leads to tungling ,numbness or weakness of muscle.
Next Steps
u can choose to get electromygraphy and nerve conduction velocity study to rule out neuropathy.
but at same time rule out other causes of cramps
Health Tips
will suggest a clinical evaluation sos investigations by an orthopaedic surgeon nearby.
hope this helps.