It appears that you may be suffering from sciatica. Sciatica can lead to a burning sensation down your right leg and along the lower back region, which feels similar to icy-hot. When the discouraging thing happens, either a slipped disc or tight muscle arrays often irritate the sciatic nerve. Essential things to remember include getting enough sleep and using ice packs or heating pads while doing mild stretches every day until the problem resolves itself. Persistent pains require consulting with an orthopedist for further treatment.