Cyanosis, especially if developed recently, is more commonly detected by a family member than the patient. The florid(鲜红色的 ;气色好的) skin characteristic of polycythemia vera(真性红细胞 增多症) must be distinguished from the true cyanosis discussed ereCyanosis, especially if developed recently, is more commonly detected by a family member than the patient. The florid(鲜红色的 ；气色好的) skin characteristic of polycythemia vera(真性红细胞 增多症) must be distinguished from the true cyanosis discussed here