The legs are sore and weak when sleeping at night, which may be caused by the following aspects, and according to different reasons, the treatment method is also different. 1, it may be long-term standing, walking during the day, or long-term strenuous exercise people, resulting in local muscle strain and weakness. You can give local hot compresses at night before going to bed, or use hot water to soak your feet. If you can use mugwort, safflower boiled water foot soak effect will be better, promote blood circulation in the lower limbs, relieve local muscle strain symptoms. 2, may be caused by lumbar spine disease, such as lumbar disc herniation, lumbar spinal stenosis, lumbar spine slippage compression of the nerve roots of the lower limbs, so that the nerves of the lower limbs appear numbness, weakness, pain and other symptoms. If it is caused by lumbar spine disease, treatment of the lumbar spine must be the main focus. Oral medication, physical therapy, and acupuncture and massage therapy in Chinese medicine can be used to receive better results. However, if the symptoms still do not improve through repeated conservative treatment, surgery must be considered.