► a lingering/nagging doubt (=one that does not go away)· I still had a nagging doubt that there might be something seriously wrong.
► a nagging pain (=felt all the time)· Rob felt fine, apart from a nagging pain in his left wrist.
► a nagging suspicion (=one that you have all the time)· I had a nagging suspicion that Colin wasn't telling me the whole truth.
► a nagging worry (=one that you keep worrying about)· She had a little nagging worry in the back of her mind about how Mickey would react.