Disease factors
protrusion of the lumbar intervertebral disc
When the nucleus pulposus of lumbar intervertebral disc breaks through the posterior longitudinal ligament and compresses the nerve root, it will cause radiation numbness and pain in one or both lower limbs.
myeleterosis
Spinal cord diseases involve sensory conduction bundles, and the nerve conduction function is abnormal, which can lead to numbness in the legs. The common causes are spinal cord occupation, spinal cord injury, myelitis and subacute combined degeneration of spinal cord.
Intracranial lesions
Intracranial lesions invade sensory conduction fibers, affect sensory function, and appear numbness of lower limbs. Mainly seen in cerebral infarction, cerebral hemorrhage, brain tumor, intracranial infection and so on. In addition, brain injury, such as brain contusion and brain stem injury, may also lead to leg numbness.
diabetes
When diabetes causes peripheral neuropathy, it will cause sensory disturbance at the extremities.
Drug factor
Heavy metal poisoning or some drugs, such as chemotherapy drugs, may involve peripheral nerve conduction fibers, causing abnormal sensation in lower limbs.
way of life
Some bad postures in life will oppress the nerves and affect the blood supply of the lower limbs, which is manifested as numbness of the legs, such as sitting for a long time, squatting for a long time, crossing one's legs and so on.