Home > Could my leg ulcers be caused by varicose veins? > Could my leg ulcers be caused by varicose veins? Could my leg ulcers be caused by varicose veins? Home > Could my leg ulcers be caused by varicose veins? > Could my leg ulcers be caused by varicose veins? Most leg ulcers are caused by venous problems. The valve failure which causes ulcers is the same valve failure that causes varicose veins so most venous ulcers are also associated with varicose veins. Some patients however do get venous ulcers due to valve failure without any evidence of varicose veins.