Cold wind in the legs is usually caused by cold, the patient can feel the skin of the legs with the back of the hand, if it feels cold, it means that the patient’s lower limb blood circulation is poor, this condition may be caused by improper warmth, if the clothing is not changed in time when the seasons change, the legs will have a cold feeling due to the cold. In addition, varicose veins or venous thrombosis in the lower extremities may also lead to poor blood circulation and cause cold sensation. It is suggested that patients may choose to go to the hospital for further consultation and then choose lower extremity venous ultrasound to confirm the diagnosis. Finally, a herniated lumbar disc compressing a nerve can also cause a cold sensation in the lower extremities, but the temperature is not low when touched with the hand.