raynauds is a disease that causes some areas of the body such as fingers ,toes, tip of your nose, and ears to feel numb or cool from cool temperatures or stress. When an episode occurs the victim will feel a numb cool feeling in the effected area. the episodes are caused by being stressed out and or cold temperatures. About 5% of the U.S. population has raynauds. avoiding the things that trigger the symptoms of raynauds is really the only way to prevent these episodes from happening. treatments involve a change in lifestyle, using medicines, and rarely surgery.


http://www.mayoclinic.com/health/raynauds-disease/DS00433