obsessive thoughts

Translations
навязчивые мысли
He can't sleep because of obsessive thoughts.
Он не может спать из-за навязчивых мыслей.
Definitions
Obsessive thoughts are persistent, unwanted ideas or images that repeatedly enter a person's mind, often causing significant anxiety or distress. These thoughts can be intrusive and may lead to compulsive behaviors as the individual attempts to alleviate the discomfort associated with them.