A lie down leg uncomfortable, there are two common reasons: 1, may be the leg muscle chronic strain, usually are seen in long-term standing, walking, or long-term do running, bouncing and other sports personnel more common. 2, may be lumbar spine disease compression of the nerve roots of the lower limbs, common is lumbar disc herniation, lumbar spinal stenosis or lumbar spondylolisthesis compression of the nerve roots of the lower limbs caused by, after lying down The compression of the nerve roots becomes more serious and thus the symptoms appear. If it is unilateral leg discomfort, lumbar disc protrusion is the main cause. If there is bilateral leg discomfort, it is possible that lumbar spondylolisthesis or lumbar spinal stenosis is the main cause.