There are several different signs that a pullet or hen might be broody or might be going broody. My test to determine if one is truly broody is where does she spend the nights. If she spends two consecutive nights on the nest instead of sleeping in her normal spot I consider her broody. It has to be two consecutive nights, not one.
Sometimes you can stop a hen from going broody that is showing some signs by removing her from the nest. Don't let her get too comfortable. But once one has truly committed to being broody it usually takes more effort. I lock them in a raised wire-bottomed cage for three days with food and water so they cannot go back to the nest. Others sometimes have success with other methods.is there any way to stop the broodiness would you know