Sleep deprivation
Adults need seven to nine hours of sleep each night, children and teens even more, older adults sometimes a little less. Getting less sleep than required on a regular basis leads to sleep deprivation. Along with the number of hours the quality of sleep matters too.
During sleep our body heals itself and restores its chemical balance, strengthening the immune system. Sleep deprivation prevents your immune system from building up its infection fighting protective forces. If you don’t get enough sleep, your body may not be able to resist germs and viruses, and it may also take you longer to recover from illness.
Sleep deprivation can intensify pre-existing mood disturbances, taking a serious toll on your mental, physical, and emotional health. While coping an occasional sleepless night correlates with these changes in function. Sleep deprivation can also lower the individual's quality of life.