The pain in the lower back after waking up is particularly common in daily life and is caused by the following reasons: 1. overwork during the day, stressful work, mental tension, resulting in muscle strain and pain in the lower back; 2. it may also be caused by wind and cold stimulation during sleep at night, resulting in muscle stiffness and pain in the lower back, if this is the case, it can disappear after getting up and moving. 3. 3.More likely, the pain in the low back is induced by the incorrect posture of sleeping at night and the poor blood circulation due to the prolonged local compression. If the symptoms can be relieved after getting up and moving around, it is basically caused by the incorrect sleeping posture at night. If it is difficult to be relieved within a period of time or occurs regularly, it is more likely to be caused by diseases.