You are diagnosis is lumber spondylitis... its age related problem because joint space reduced between the L3to L5 andS1.and sciatica nerve compression It's called IVDP.
Symptoms like pain numbness radiating pain lower limbs and difficult walk difficult prolonged stand stiffness joints ..
Next Steps
You can consult orthopaedic
Health Tips
Avoid climb stairs and prolong stand and forward bend spine and maximum time rest