Crying can reduce stress!

Crying after an emotional event produces tears that contain a large amount of the neurotransmitter leucine enkephalin, a natural painkiller that the body releases to reduce stress. Interestingly, tears that are produced when chopping an onion don't contain nearly as much of this neurotransmitter. So, a good cry while going through a difficult time can actually release some of those stress chemicals and help you feel more at peace.