I had this very very painfull problem a few years ago, Couldnt get to sleep cos of the pain it was the worse pain I have ever had, I was put in touch with a old sports physio who put something like deep heat on the top of my leg and massaged it so flippin hard it bruised me , to be honest the pain he caused was worse than the sciatica, he charged me �3 and i went away bruised and pained, by the morning the bruises were there but the pain had subsided and subsequently dissapeared over the following 24 hours...... Best of luck........