Review the causes of these more specific types of Vein symptoms: 1  Varicose veins (65 causes). 2  Bulging veins (3 causes). 3  Bulging neck veins (10 causes). 4  Bulging abdominal veins (11 causes). 5  Deep-vein thrombosis (42 causes).6  Venous insufficiency (8 causes).7  Vein pain (6 causes).8  Vein bruise (6 causes).eview the causes of these more specific types of Vein symptoms: 1  Varicose veins (65 causes). 2  Bulging veins (3 causes). 3  Bulging neck veins (10 causes). 4  Bulging abdominal veins (11 causes). 5  Deep-vein thrombosis (42 causes). 6  Venous insufficiency (8 causes). 7  Vein pain (6 causes). 8  Vein bruise (6 causes).