Sore legs at night may be caused by sleeping in the wrong position, trauma, lumbar disc herniation and so on. 1. Sleeping position is not right: sleeping at night leg pain may be sleeping position is not right, the leg of the nerve compression caused by the general change of position to sleep or get up and walk around can be relieved. 2. Trauma: Sleeping at night leg pain may be sleeping legs hit the foot of the bed caused by trauma, and then appear at night sleeping leg pain. 3. Lumbar disc herniation: Sore legs at night may be caused by lumbar disc herniation due to prolonged standing and sitting, because the legs are innervated by the sciatic nerve, which emanates from the lumbar region, and when the lumbar disc herniation stimulates the sciatic nerve, sore legs at night will appear. Sleeping at night leg pain may also be related to other diseases, such as osteoporosis, bone tumors, etc., in ruling out the sleeping position is not the case, it is recommended to consult a doctor, after a clear diagnosis, and then targeted treatment.