To inhibit ongoing thoughts, feelings or behaviors is associated with physiological work...If active inhibitory processes are maintained over an extended period of time, they serve as a long-term cumulative stressor that increases the probability of stress-related diseases. A particularly insidious form of inhibition occurs when individuals have experienced a traumatic event that they are unable to discuss with others.
Disclosure of Trauma and Health Among Holocaust Survivors
James W. Pennebaker, Steven D. Barger, and John Tiebut (1989)
Psychosomatic Medicine, 51, 577-589