Getting up with back pain relieved after activities, the possible causes are lumbar cold, lumbar muscle strain, ankylosing spondylitis, etc.. 1. Cold lumbar region: Because of the cold lumbar region when sleeping (such as blowing air-conditioning or winter cold, etc.), can cause the lumbar muscles stiff and straight, local blood circulation is not good, and cause lumbago. Through activities can promote local blood circulation, improve the symptoms of low back pain. 2. Lumbar muscle strain: If the body is not in a position for a long time when sleeping, or the posture is not correct, resulting in a long period of time in the muscle tension state, resulting in muscle strain, generally through massage, activities, the symptoms will be relieved. 3. Ankylosing spondylitis: early often have lower back pain and morning stiffness symptoms, symptoms are reduced after activities, but also with weakness, loss of appetite and other symptoms. In addition to the above reasons, overwork and rheumatoid arthritis can also cause the above symptoms. If the above symptoms are severe, or if the symptoms persist and do not improve, it is recommended to consult a doctor in time to identify the cause of the disease and carry out targeted treatment.