When the sciatic nerve is narrowed or compressed, it causes pain in the lumbar region, which can be experienced by men between 35 and 55 years of age or by women after giving birth. Causes: wrong movements, herniated discs, aging of the spine, stenosis of the spinal canal. The sciatic nerve is a nerve that ensures both the sensitivity of a part of the lower limb and part of its movements: it is sensory and motor. Symptoms: Pain in the lumbar area, inability to move, numbness in the legs, pain in the lower limbs...