Dwelling on stressful events can increase inflammation in the body, study finds

"Dwelling on negative events can increase levels of inflammation in the body, a new Ohio University study finds. Researchers discovered that when study participants were asked to ruminate on a stressful incident, their levels of C-reactive protein, a marker of tissue inflammation, rose. The study is the first time to directly measure this effect in the body."

http://medicalxpress.com/news/2013-03-stressful-events-inflammation-body.html