1, quit smoking and emotional stability: nicotine and mood swings can make sympathetic excitation, causing vasospasm, should assist patients to quit smoking, while diet less or no caffeine-containing beverages. Explain the advantages and disadvantages, so that patients take the initiative to cooperate. 2, avoid pressure on the affected limb: tight clothing, legs crossed at the knee sitting, rouge fossa under the pad and excessive hip flexion, etc., can compress the blood vessels, affecting the arterial blood supply, should be avoided as far as possible. 3, pay attention to warmth: exposure to cold air and direct contact with cold objects can cause arterial constriction or spasm. Keep the room temperature appropriate and avoid contact with cold water. When you go out in the cold season, you should pay attention to keep warm, avoid exposing your limbs outside, and your clothes and shoes and socks should be loose and soft.