When does it happen? Sitting, standing, driving in the car?
Do
NOT get a nerve conduction velocity test.
I always have found phantom limb pain to be fascinating, and have sadly seen more of it than I would like. You can help them with it sometimes, sometimes not. Seem to remember reading something about spinal anesthesia reducing the incidence of it, oops had it backwards, precipitating it.
Clinics - Phantom limb pain induced by spinal anesthesia
MS in the family, zoinks