I was having an issue with my back, I have had the problem before and it was siatica, this time while trying to get comfortable, i streched by leg out, and the pain went away, but then my foot became numb, and has a burning sensation that worsens when i urinate. I have had a back fusion many years ago, and know that the bone has expanded to the point it puts pressure on my spinal canal, but the burning sensation in my foot when i urinate is quite bothersome.