Herniated disc in 2015. Pain completely?

While doing Deadlift exercise for the lower back, I injured the muscle, which was later diagnosed as a herniated disc. I was on two rounds of medication from different doctors and the pain somewhat subsided but I still have pain in my sciatic nerve region. While in a seated position on a chair, I cannot extend my legs individually without a lingering pain in my lower left hip region. It had reduced drastically over the course of 1.5 years but I still have pain occasionally. I used to take Gafaerical but stopped after two months, once there was improvement (according to the doctor). I haven't done any physically strenuous exercise since then and have confined to just walking daily for a few kilometers. Is my condition curable? What home remedies or exercises can I do to help alleviate the pain completely? Please help me.