The sciatic nerve is afraid of getting cold, but at the same time the sciatic nerve stem has good muscle, fascia, fat, and skin coverage, and has some resistance to the stimulation of general physical and chemical factors, and is not weak. In daily life, do not be afraid of the sciatic nerve cold and be cautious and fearful, this is also not right. A cold sciatic nerve can affect the blood circulation of the nerve, resulting in damage to the nerve, such as congestion, edema, and inflammatory reactions, which can lead to corresponding pain or abnormal sensation of the nerve. If corrected within a short period of time, the nerve will not produce irreversible pathological changes. If prolonged compression, irritation, and cold exposure, local nerve erosion and swelling compression for a long time will lead to irreversible damage to the nerve, and there will be residual local pain, muscle weakness, or abnormal sensory sequelae.