Suggest Treatment For Severe Right Calf Pain From Ankle To Knee

I have had severe right calf pain from my ankle, front of the calf, and now radiating to above and under my knee.....I have had several tests and my neurologist is pretty certain it is referred pain from the lumbar spine. So, that was my most recent test. It only showed the following: L4/5- Mild diffuse annular bulge with facet arthropathy results in mild spinal canal narrowing. This pain is so deep and so intense (chronic) that I wonder if it has to be something else. I am on narcotics round the clock.