The reasons for sleeping on the board bed lumbar pain are as follows: First, it may be that the board bed is cooler and harder, and although it supports the strength of the lumbar muscles, the muscles will still be not well padded because they are on a harder board bed, resulting in muscle tension and causing pain. Secondly, generally the board bed is more in place to support the lumbar muscles, when the lumbar pain needs to exclude muscle tension, muscle strain, lumbar muscle strain, etc., but also pay attention to other lumbar pain, such as herniated disc, some bone inflammation and other causes, such as medical or urological diseases caused by lumbar pain, pay attention to whether there is no radiating pain in the lower limbs, whether there is morning stiffness, whether there is abdominal pain, nausea, urinary urgency, painful urination. Also pay attention to rest, add some padding to the board bed appropriately, you can apply hot compresses, and if you are not allergic to creams, you can also apply topical medication. If the pain is not relieved after rest, sleep improvement or analgesic treatment, or if there are other conditions such as abdominal pain, it is necessary to go to the hospital for a clear examination and then treat the symptoms.