Primary Raynaud's is a disease or a disorder: it is not merely a trait.
Belch
J J
JJ
Khan
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D006801:Humans; D011928:Raynaud Disease / Q000473:pathology* / Q000503:physiopathology*; D013035:Spasm; D013564:Sympathetic Nervous System / Q000473:pathology / Q000503:physiopathology; D009626:Terminology as Topic; D014652:Vascular Diseases / Q000473:pathology / Q000503:physiopathology; D014661:Vasoconstriction