Patients with soreness and weakness in both legs are caused by the following: 1. Patients with calcium deficiency or potassium deficiency are prone to soreness and weakness in both legs. 2. Patients with lumbar spinal stenosis, lumbar spondylolisthesis and swelling in the lumbar spinal canal, and patients with central lumbar disc herniation are prone to soreness and weakness in both legs after the spinal cord is compressed in the spinal canal. 3. 4, see the two legs muscle, fascia, ligament strain, cold situation, will also appear soreness, weakness. Therefore, after the patient appears soreness and weakness of the legs, it is necessary to consult a doctor to identify the cause and treat the condition to promote symptom reduction and recovery, and pay more attention to keep warm when the symptoms are obvious, avoid getting cold, and avoid excessive force and activity on the legs to avoid aggravating the symptoms.