Redness and inflammation of the skin along a vein, warmth of the skin and tissue, tenderness in the affected area and pain in the limb are common symptoms of superficial thrombophlebitis, notes Healthline. Darkening of the skin over the vein and vein hardening are also common symptoms of the condition.
Superficial thrombophlebitis is a condition in which veins become inflamed due to a blood clot below the skin, states Healthline. The condition affects women more than men, and most commonly occurs in the legs, though it may appear on the arms and neck. Risk factors associated with superficial thrombophlebitis include pregnancy, obesity, disorders that increase blood clotting, smoking and the use of oral contraceptives.