hi,thanks for query.8 years is pretty long time ,please go for x ray
as per the advise and look for the cause.There could be some nerve
compression at some level which is giving rise to pain and numbness
that you have.After x ray your doctor after examination will give you some medicines which can help you.At times further investigation like MRI
can be needed.Do regular exercise to strengthen back muscles to avoid this from happening again.Also get your blood sugar checked.
wishing you good health.