I am suffering from leg pain in my calf and back of knee when I walk. I do construction job. I do not understand whether it nerve or muscle. If I think it as nerve I am getting pain above knee and near hip also. It gradually changes side. Sometimes I do get left and sometimes right. But mostly on left. I have been with this for more than 1 month. I have consulted orthopedist, neurologist. They said it as normal and just a muscle strain and prescribed medicines. But no use. Some times I am getting as if it is sciatica that I can not keep complete weight on leg. There is no swelling. I do smoke also. I am suffering with cervical spondylosis since 2 years. I don't understand what is it but sometimes it os disturbing my works. Please kindly help me.