The pain can be isolated to an area in the middle of foot, or it can radiate outward towards the toes. The heel is another common area for Plantar Fasciitis pain to show up. Manley treats this successfully each year in his practice.
If an MRI shows a herniated disc or nerve root impingement, your physician may want to talk about surgery, but there are non-surgical ways you can heal your back and disc disease. Not appropriate for everyone, but worth investigating