The symptoms of low back pain after a night’s sleep are as follows: 1. It may be due to excessive work or load during the day before going to bed, long hours of walking or standing, excessive load followed by lumbar muscle strain, which will be aggravated when sleeping. 2. It may be due to uncomfortable sleeping bed, hard or soft, lack of support for the lumbar region, resulting in pain from lumbar muscle strain. 3. The spasm of the lumbar muscles will cause the symptoms of lumbar pain when you wake up. 4. The incorrect posture of the body when sleeping causes the spasm of the lumbar muscles when you twist your waist to sleep, which causes the symptoms of lumbar pain when you wake up. Therefore, if the symptoms of low back pain appear after a night’s sleep, you should rest in bed, give local physical therapy and avoid strenuous activities of the waist. If there is no relief within a short period of time, the symptoms are progressively aggravated or the symptoms persist, you need to go to a regular hospital immediately to complete the necessary tests and choose the appropriate treatment after the cause is clear.