Generally, bone marrow aspiration does not cause numbness in the legs, but if the symptoms of numbness occur, it may be related to the injury of nerves or lumbar intervertebral disc disease during the surgery. In the process of bone marrow puncture surgery, if the direction of the puncture needle is skewed, it may puncture the nerves around the bone marrow, causing damage to the nerves, which leads to abnormal sensation in the innervated area, and then causes numbness in the legs. When the lumbar intervertebral disc structure undergoes hyperplasia and degeneration, it may lead to narrowing of the intervertebral disc space and damage to the surrounding tissues, resulting in slow blood circulation, which may affect the nutritional status and blood supply of the thighs, resulting in symptoms of numbness in the thighs. In conclusion, bone puncture will not cause numbness of the legs, if there is numbness of the legs, you need to go to the hospital to find out the cause of the disease.