35 years old leg numbness consider lumbar disc herniation caused by the possibility of large, but also may be caused by peripheral neuropathy and cerebrovascular disease and so on. Leg numbness is mostly caused by lumbosacral nerve root compression. A variety of reasons can lead to nerve root damage, the most common cause is lumbar disc herniation. The most common cause is lumbar disc herniation, which causes narrowing of the intervertebral foramen and compression of the spinal nerve root, leading to numbness of the legs. It is mostly unilateral and is related to sedentary lifestyle, heavy physical labor, obesity and other reasons. Other causes of leg numbness are peripheral neuropathy (diabetic peripheral neuropathy, Guillain-Barre syndrome), cerebrovascular disease, brain tumor, trauma and so on. In addition, fatigue and cold and other reasons can also cause leg numbness symptoms, remove the triggers can be relieved, usually without special treatment. At the age of 35, it is recommended to consult orthopedics, neurology or other related departments, and follow the doctor’s instructions to carry out relevant examinations to clarify the cause of the disease and timely treatment, so as to avoid delaying the condition.