If soreness below the waist, the following causes are common: First, overexertion: patients participating in heavy physical labor or prolonged exercise of the lower body, such as running, long jump, etc., can lead to excessive strain on the muscles below the waist, thus causing clinical symptoms of muscle soreness, and patients cannot even walk with weight and need to rest to relieve symptoms. Second, serious lumbar spine diseases: such as lumbar disc herniation, lumbar spinal stenosis, lumbar spondylolisthesis, etc., can also lead to clinical symptoms of soreness and pain in the lumbar region, including both lower limbs, while lumbar spine activities can also be significantly affected, and the disease can be judged by taking MRI, X-ray, CT, etc. Through early diagnosis and early treatment, the above symptoms can be relieved. If the best time for treatment is missed, the disease will continue to worsen and eventually surgery will be required.