Foraminal stenosis is some risk to live with but generally can be ignored unless or until symptoms get in the way. This is different than central canal stenosis where cord compression is riskier to live with.
Generally, if the symptoms of foraminal stenosis are present (cervical radiculopathy or arm pain, numbness and weakness) then these should be treated (unless the symptoms are minimal and you could live with them). The danger is with permanent nerve injury (rare but possible). Continued compression of an injured nerve could lead to chronic radiculopathy.
If symptoms are not present, then the risk is lower. I would avoid activities that cause extension (bending backwards) to prevent or reduce the compression of the nerve roots.
Posterior foraminotomy can be a good procedure but has some risks as well as benefits (see the section here on cervical foraminotomy ). Only you can determine if you need further surgery by the amount of impairment you have based upon the intensity of your symptoms.
Dr. Corenman
Donald Corenman, MD, DC is a highly-regarded spine surgeon, considered an expert in the area of neck and back pain. Trained as both a Medical Doctor and Doctor of Chiropractic, Dr. Corenman earned academic appointments as Clinical Assistant Professor and Assistant Professor of Orthopaedic Surgery at the University of Colorado Health Sciences Center, and his research on spine surgery and rehabilitation has resulted in the publication of multiple peer-reviewed articles and two books.