Fomerfire, I am experiencing the same thing. I am 9 1/2 weeks post microdiscectomy on L5-S1. I had a very large fragment that was crushing my nerves and I basically had lost a ton of strength in my right leg. It all happened in only 6 weeks and due to the weakness and loss of reflex I did the surgery. I had some relief for the first few weeks, but in the past 3 weeks or so the sciatic pain is coming back. I had an MRI done last week just to make sure there wasn't anything going on as I too am getting weird senssations in the OPPOSITE leg (cold/hot spots, some numbing in hamstring and calf area). The MRI was clean. My surgery side is now getting burning and electrical type pain in the hamstring. I walk everyday up to about 2 miles and feel great. It is mostly when I am laying down or standing still for too long. My back gets really hot sometimes too, like a hot tight feeling, not sure if it is the muscles. In any event, I am not sure what causes all of this, other than the nerves still recovering? I read somewhere that when nerves are healing they sometimes feel the same as when they were getting damaged, i.e. burning, etc. - not sure how true that is, but I am hoping that's all this is! Be well and maybe you should get some meds for the long plane trip. My doctor started me on Lyrica, but I only took it once so far so can't tell you anything about it...best of luck and feel good.