Small arteriovenous fistulas in the legs, arms, lungs, kidneys or brain often won't have any signs or symptoms. Small arteriovenous fistulas usually don't need treatment other than monitoring by a health care provider. Large arteriovenous fistulas may cause signs and symptoms. Arteriovenous fistula signs and symptoms may include:  Purplish, bulging veins seen through the skin, similar to varicose veins Swelling in the arms or legs Decreased blood pressure Fatigue Heart failure  A significant arteriovenous fistula in the lungs (pulmonary arteriovenous fistula) is a serious condition and can cause:  Pale gray or blue lips or fingernails due to lack of blood flow (cyanosis) Fingertips to spread out and become rounder than normal (clubbing) Coughing up blood  An arteriovenous fistula in the digestive tract can cause gastrointestinal (GI) bleeding.
small arteriovenous fistulas legs  arms  lungs  kidneys brain won't signs symptoms  small arteriovenous fistulas don't need treatment monitoring health care provider  large arteriovenous fistulas may cause signs symptoms  arteriovenous fistula signs symptoms may include:  purplish  bulging veins seen skin  similar varicose veins swelling arms legs decreased blood pressure fatigue heart failure  significant arteriovenous fistula lungs (pulmonary arteriovenous fistula) condition can cause:  pale gray blue lips fingernails due lack blood flow (cyanosis) fingertips spread rounder normal (clubbing) coughing blood  arteriovenous fistula digestive tract can cause gastrointestinal (gi) bleeding
arteriovenous fistula