What percentage of people suffers from raynaud's phenomenon?

About 5% in the U.S.: An estimated 5% of people in the United States have symptoms of raynaud's phenomenon. People with raynaud's symptoms can have vasospasm in the blood vessels supplying their fingers and/or toes, triggered by exposure to cold, vibrations, emotional stress, etc...

Few: It is somewhat random. There may be people prone to the problem that do not have the cold exposure!