The big chill: Raynaud's phenomenon. Having cold hands is common--Raynaud's phenomenon is not. Bundling up helps both.
D001327:Autoimmune Diseases / Q000209:etiology; D001833:Body Temperature Regulation; D006801:Humans; D011928:Raynaud Disease / Q000175:diagnosis* / Q000209:etiology / Q000628:therapy; D012737:Sex Factors