What Causes Severe Back Pain And Heaviness In Right Leg?

hi doctor i am suffering from back pain and also my right leg sometime become heavy and sometime i feel my veins stretched in legs this problem occur from 4 years due to jerk from generator , i am already consulting from doctor of aiims they suggest me for exercise and also sugest for heating , i feel relax when i get heating but after 1 day become as usual , they also prescribed medicine like doclofenac , nurokind tab, .. please suggest for immediate relief