tension irritates sciatic nerve

I slept for 4 1/2 in one go last night which was brilliant, and also I was virtually pain free, but then my brain kicks in and the pain starts up again, I tried so hard not to let, and tried to stay relaxed, but alas no. I am shocked that I am contributing to my current pain,why would I do that? So today I will concerntrate on relaxing techniques,  I presume the psychological tension caused, as in rigidity, irritates and affects, my sciatic nerve which then causes pain, which does not respond to painkiller,. Well yet another lesson