The neck of the feet cool to consider is due to cold, blood circulation disorders, rheumatoid arthritis and other reasons, in order to avoid aggravation of the condition, should do a good job of keeping warm. 1. Cold: the fat in the neck of the feet compared to other parts of the body will be relatively small, in the case of wearing less clothing, easy to appear cold situation caused by the internal organs of the body dysfunction, which will show the phenomenon of coolness. 2. Blood circulation disorders: If long time wearing unfit shoes and socks lead to the local blood is not smooth, so that the foot blood circulation obstacles, which will appear the phenomenon of cold neck. 3. Rheumatoid arthritis: when rheumatoid arthritis occurs in the neck of the foot, it may cause the synovial membrane inside the nerve endings, blood vessel inflammation to make its sensitivity increase, so it will be easy to feel the feeling of coolness. If the foot temperature is low for a long time, it is recommended to go to the hospital in a timely manner to clarify the cause of the disease and follow the doctor’s instructions for treatment.