Don't sleep on it: going to bed mad makes it worse

PARIS: A good night's sleep may reinforce negative memories in the brain, researchers said on Tuesday, lending scientific credence to the time-worn caution against going to bed angry.

Slipping into slumber while holding on to a freshly-formed bad memory engraves it in the brain, making it harder to shake off later, a team from China and the United States reported in the journal Nature Communications.