tread on somebody's heels

tread on (one's) heels

To walk directly behind someone; to follow someone very closely. I'm so sick of this personal assistant treading on my heels all around the office. He knew the police were treading on his heels, but he didn't speed up or change course so that he wouldn't arouse suspicion.
See also: heel, on, tread

ˌtread on somebody’s ˈheels

follow somebody closely: In the end she left the meeting room, with her assistant treading hard on her heels.
See also: heel, on, tread