Cyanosis or necrosis of the fingers is an ischemic symptom of the upper extremity in the clinical manifestations of subclavian artery steal syndrome. The common ones are intermittent dyskinesia, upper limb weakness, pain and sensory abnormalities in that order, and very rarely cause cyanosis or necrosis of the fingers. What should patients pay attention to in the usual diet? 1, staple foods need to match appropriate staple foods should be mainly rice, noodles, mixed grains, but we should pay attention to achieve a variety of varieties, coarse and fine match appropriate. 2, should not eat spicy food Patients should not eat spicy food, but do not drink an excessive amount of alcohol, quit smoking, and eat more fresh vegetables and fruits. 3, reduce sweet and thick food If you eat too much fat, sweet and thick food, and less activity, so that the body lipids increase, blood viscosity increases, blood flow is slow, but not conducive to the repair of the femoral head. 4, reduce the intake of alcohol Drinking white wine, beer is harmful to the human body, only drinking a small amount of wine has a softening effect on blood vessels, osteoarthrosis patients in just after drinking alcohol will feel the symptoms reduced, this is because drinking alcohol inhibits the function of the central nervous system, and alcohol will aggravate the symptoms, long-term dependence on drinking alcohol for pain, the human body is more harmful, especially osteonecrosis of the femur patients must stop drinking. 5, eat more calcium-containing foods Give enough calcium daily to make up for the loss of mineral components in the bones. In the daily food, the most calcium-rich dairy products, such as milk, yogurt, ice cream; and seafood, such as fish, shrimp is also rich in calcium food.