Lumbar pain after lying down to sleep can be seen in a variety of reasons such as lumbar muscle spasm, lumbar small joint disorder and lumbar muscle strain. In addition to lying down to sleep lumbar pain, lumbar pain can also occur after daily activities, and the pain level can be relieved after local physiotherapy massage. In the case of lumbar pain caused by kidney problems, the pain is located in the bilateral kidney area (the angle between the lower edge of the twelve ribs and the spine), the local percussion pain is obvious, the pain is not clearly associated with bed rest, and in addition to the pain symptoms, there may also be abnormal changes in urination.