niggling

"If somebody has some niggling concerns and it triggers them to ask somebody, 'Are you OK?' then that would be an amazing outcome."

"There was something niggling in the back of my mind, I just knew something was off."

A painful and niggling neck problem that emerged in the second round of the Players only served to increase his determination to become the first to defend the title.

Ten Hag is also responsible for making Bruno Fernandes United's captain, with his main contribution here being constant complaining and niggling that eventually led to an inevitable yellow card.

Weren’t the niggling and complicated MLS salary rules set up to prevent that?