Because ruminating becomes problematic when it impairs our ability to function healthfully. It becomes problematic when we're unable to maintain an optimistic mood, to connect with others, to sleep or to attain inner peace, Arey said.

What is obsessive rumination disorder?

Rumination and OCD

Rumination is a core feature of OCD that causes a person to spend an inordinate amount time worrying about, analyzing, and trying to understand or clarify a particular thought or theme.

Is rumination a mental illness?

Rumination is sometimes referred to as a "silent" mental health problem because its impact is often underestimated. But it plays a big part in anything from obsessive compulsive disorder (OCD) to eating disorders. And the impact of mental health problems is huge.