Losing even a couple of hours of sleep can make you angrier the next day, according to the experiment in which half the participants averaged about seven hours of sleep a night while the other have got only four and a half. And whereas we typically get used to irritating conditions (like a neighbor’s music or construction noise) as time goes by, being sleep-deprived can makes us unable to adapt, so that we stay frustrated. Getting insufficient sleep on a regular basis, which more than a third of adults report, is associated with mental health conditions like depression and anxiety, along with illnesses like diabetes, obesity, and heart disease. If you don’t get enough sleep, be militant about sleep hygiene, with steps like minimizing caffeine and alcohol, getting regular exercise (but not close to bedtime), giving yourself a regular bedtime and wake time, using red wavelength light in your bed and bathrooms if possible, and creating a tech-free relaxation ritual at night (hot bath, dim lights, soft music, the works!). And of course, talk with your physician if you think you may have a sleep disorder, even snoring.
Source: Sleepy anger: Restricted sleep amplifies angry feelings.
“Both correlational and experimental (yes, researchers actually bring people into labs and keep them up all night… any volunteers?) evidence suggests that when people are sleep deprived, they feel more irritable, angry and hostile.”
Amie M. Gordon, Ph.D.