Sleeping on a soft bed is not recommended for diseases such as lumbar muscle strain because the quality of the lumbar muscles of patients with lumbar muscle strain decreases, which is particularly prone to cause injury. If you sleep in a soft bed, the lumbar muscles will be subjected to prolonged pulling and other undesirable stimuli, which will inevitably lead to lumbar muscle injuries after a long period of time, triggering pain in the lumbar symptoms. So lumbar muscle strain is more suitable for sleeping on a hard board bed, but does not need to be particularly hard, hardness can be on the upper side. This can make the lumbar muscles appropriate relaxation, will not trigger the pain symptoms of lumbar muscle strain.