Sciatica is no joking matter, well you could try to make a joke about it but it wouldn't be very funny. This type of pain stretches from your lower back to the hamstring, the compression of certain nerves in your lower back causes the pain.

Reasons for the compression of the nerves vary from as serious as a slipped disk to as simple as overexerted muscles. Sciatic nerve pain relief is never very complicated though; most of the time sciatica is not serious and can be relieved by something as simple as a hot water bottle.
It doesn't have to be really hot; the hot water bottle doesn't even need to be hot at all. For sciatic nerve pain relief you only need it to be warm. Otherwise, you would have to search the internet for treating burns, and we don't want that. Situate the bottle in the pained area to relax the muscles, and while the muscles don't hurt as much stretch them to relieve some pressure off the sciatic nerve.
Continue read here
Really Hot Sciatic Nerve Pain Relief