Blue Toe Syndrome is a syndrome in which there are a number of reasons for the development of embolism of the terminal arteries of the limbs. 1.Blue finger/toe syndrome is a syndrome in which microvascular occlusion of the limb causes blue-black, jagged, non-fading spots on the fingers or toes, accompanied by severe pain and other symptoms, and the cause of the disease is mostly an atherosclerotic embolus. 1976, Karmody named it for the first time. In essence, it is a tiny embolism of the terminal arteries of the limbs, which should belong to the category of arterial embolism. 2. Some reasons such as atherosclerosis plaque rupture, cholesterol crystal accumulation and micro-thrombus shedding caused by the emergence of limb terminal artery embolism. Common in the elderly, mainly manifested as a finger / toe or more fingers / toes appeared in the current blue-purple spots, there is no good cure, only symptomatic treatment, such as taking the expansion of blood vessels and anticoagulant thrombolytic therapy. 3. The treatment needs to clarify the components of embolism, if it is caused by cholesterol crystal accumulation, you can use statin drugs to reduce cholesterol and reduce the formation of embolism, such as lovastatin. The use of drugs need to be under the guidance of the doctor, not unauthorized use of drugs.