Sciatica can cause sensory abnormalities in one lower limb and even lead to muscle weakness. It can also cause numbness and sensory abnormalities on the dorsum or sole of the foot. However, foot numbness should first exclude causes like exposure to cold or poor blood circulation in the lower limbs. After excluding other causes of foot numbness, it can be diagnosed as sciatica-induced symptoms such as foot numbness. At this time, it is advisable to actively nourish the nerves and avoid certain postures that may aggravate sciatica. Additionally, sciatica can also be caused by lumbar disc herniation, or simply by the local compression of the sciatic nerve in its course.