Excessive limb growth and thickening is one of the clinical manifestations of congenital arteriovenous fistula, which is caused by abnormal development of the embryonic primordium during its evolution, resulting in abnormal traffic between the arteries and veins. Based on the history and physical examination, the diagnosis is usually not difficult. Congenital arteriovenous fistulas are associated with varicose veins. Therefore, the possibility of congenital arteriovenous fistula should be considered in young people or children when varicose veins are found without an obvious cause, especially if they are found unilaterally or in uncommon areas. The diagnosis is even more doubtful if the patient is found to have limb growth, thickening, hairiness, and easy sweating. What are the dietary considerations? Patients are advised to eat diuretic foods; foods that strengthen the heart; foods that are low in salt; foods that are cold; and foods that are high in sugar. Desirable foods Radish: has a good diuretic effect, can improve preload to play a role in increasing the strength of the heart muscle. 250g stewed with ribs for consumption. Bitter melon: has the effect of lowering blood lipid levels and can improve the function of the blood vessel wall. Winter melon: has a good diuretic effect, can reduce the heart preload and improve the function of the heart muscle. Avoid food Iced sugar: high sugar content and refined sugar, can cause a transient viscosity of the blood, can induce the formation of venous fistula thrombosis. Switch to low-sugar foods or tea. Crab: too cold, can cause an increase in blood viscosity, which can induce thrombosis. Switch to warm foods.