Article via https://www.psychologytoday.com
What is the difference between worry and rumination?
Worry refers to repetitive negative thoughts about potentially unpleasant future events.
Despite these differences, rumination and worry share much in common: They are both experienced as negative, repetitive, and uncontrollable.
Because negative repetitive thinking tends to decrease the chances of experiencing negative emotional contrasts.
There are two reasons people use rumination and worry as coping strategies: to avoid negative emotional contrasts.