Numbness of leg with back and buttock pain burning

Patient: Why is bottom of leg numb and back hurting and burning in hip n groin n now round ankle and 2 mri scans have come back normal

Symptoms: Lower part of right leg is numb now to just above the knee, bad pain on top of leg, burning in groin and bum pain in bum now burning round ankle and pins n needles under foot

Doctor: