The most common cause of lumbar pain when sleeping at night is lumbar muscle strain. Lumbar muscle strain, mainly lumbar muscle tendons and other tissues of long-term chronic injury caused by lumbar muscle strain has its own pain characteristics, the main performance of the rest state pain is obvious, appropriate activities after the pain is significantly reduced, the pain will not generally radiate to the lower limbs. For this kind of pain, the treatment is mainly a change in lifestyle habits, avoid strong physical labor, but also to avoid the waist a posture for too long. Usually more exercise, strengthen the function of the low back muscle exercise, generally can be improved. If the effect is not very obvious by changing the living habits, then you can use some medicines that activate blood circulation and remove blood stasis as appropriate to support the symptomatic treatment.