Does my car need to have a lube job?

DOES THIS HAPPEN MORE SO WHEN TURNING RIGHT OR LEFT OR JUST WHILE DRIVING STRAIGHT??? IT MORE SO WHEN SLIGHTLY TURNING THE WHEEL ,I WOULD CHECK THE LOWER SQUARE SHAPED POWER STEERING LINES THAT ARE LOCATED AT RIGHT LOWER FRONT OF VEHICLE. EVEN THOUGH THEY LOOK SECURE THEY TEND TO MAKE THIS TYPE NOISE. DO TO THE PRESSURE THAT RUNS THROUGH THEM AND NOT BEING SECURED PROPERLY.