I've had a back problem for 6 months. The back doctor says I have a pinched nerve. This causing numbness in my calf and tingling and numbness in all my toes and the front of the foot and at times a burning sensation. I have been using a Lynco 400 as recommended by a physical therapist. would a differnet model Lynco help alleviate some of the pain?

The pinched nerve in your back may or may not be related to a foot and ankle problem. There are Lynco orthotics that give more support than the L400 model which are used for people with overly pronating feet.