Cyanosis of the hands and feet can be seen in Raynaud’s syndrome, cyanosis of the hands and feet, etc., should be diagnosed and treated for the cause, can be consulted in rheumatology, vascular surgery, psychiatry and other departments. 1. Raynaud’s syndrome refers to the external cold stimulus, causing spasm and narrowing of small arteries supplying blood to the periphery of the limbs, manifesting as local pain, numbness, coldness and cyanosis. Mostly seen in rheumatic system diseases, need to consult the rheumatology department. If the drug treatment is not good, need surgery, can consult the vascular surgery. 2. Cyanosis is more common in young women, with a high incidence in patients with mental anomalies, manifesting as persistent, uniform cyanosis of the skin of the limbs, usually requiring no treatment, but if the symptoms continue unabated, they can be consulted in psychiatry. Cyanosis should pay attention to keep warm in daily life, avoid cold, avoid emotional excitement, quit smoking and alcohol, etc., if there is any discomfort, should be timely medical treatment.