I am 13months post op, 3 surgeries within 10 months.Damage to L5-S1 nerve root first surgery. Constant low back,leg and foot pain, Pain meds only decrease intensity. I have numbness and tingling of foot and lower leg(calf). Currently going to physical therapy and use a nerve stimulator at home. Unable to find any relief. Are there posible causes that I could look into and refer to my MD for investigation.Surgeries were discectomy,lysis of scar tissue, spinal fusion (PLIF)