Osteoporosis usually does not cause leg numbness. In some patients, osteoporosis can lead to deformation of the lumbar spine or spinal canal, spinal stenosis, or lumbar intervertebral disc problems, which may lead to leg numbness in the lower limbs. Osteoporosis alone, if there is no spinal deformation, lumbar spinal stenosis and other reasons, usually does not have leg numbness. The cause of leg numbness is nerve compression, which can lead to leg numbness. When osteoporosis and leg numbness are present, it is necessary to have a checkup, such as lumbar CT, MRI, etc., to check whether there is lumbar nerve compression, and then treatment should be given for the nerve compression, which can relieve leg numbness, or even consider surgery, which can reduce the nerve compression, and then leg numbness will improve. Of course, osteoporosis may lead to lumbar spinal stenosis, lumbar disc herniation, cervical spondylosis, etc., so osteoporosis is also a developmental process of the disease. In the above cases, it may be more meaningful to consider doing some tests to make a clear diagnosis and then treat the disease.