It is better to sleep on a hard bed if you have lumbar pain, because the most common cause of lumbar pain is muscle strain and muscle tension fasciitis. This situation is weak lumbar muscle strength, soft bed, although relatively soft, but can not support to the waist, so that the muscles and lumbar vertebrae in the horizontal position is not relaxed, the muscles in the horizontal position is still relatively tense, this tension in the case of muscle weakness or inflammation, a long time continued will be more fatigue, resulting in the accumulation of lactic acid and other inflammatory substances, thus aggravating the pain, and muscle fatigue for a long time can not be relieved, easy to make The lumbar spine is also stressed, lumbar instability, thus aggravating the lumbar spine injury, and even cause disc protrusion and other adverse conditions. So sleeping bed, or sleep hard bed is better, as long as it is not particularly hard, so that the bed surface does not sink, can well support the weight of the lumbar muscles and bones, is better.