Get some sleep

"MONDAY, Oct. 22 (HealthDay News) -- Ever get a little testy after a bad night's sleep? Scientists may now know why.

A new study finds that a lack of sleep causes the brain's emotional centers to dramatically overreact to negative experiences.

A shutdown of the prefrontal lobe -- a brain region that normally keeps emotions under control -- is the reason for heightened emotional response in sleep-deprived people, said the researchers from Harvard Medical School and the University of California, Berkeley."

More here: Mind's emotion centers less controlled when weary, MRI study shows