Skimping on sleep for an all-nighter project, a raving party or for some reason necessary affects us more than we know. The recommended sleep for adults is between seven and nine. However, the Centers for Disease Control noted that about 30% of people get less than six hours of sleep. Sleep deprivation affects our appearance, immune system, and brain functions.
According to International Classifications of Sleep Disorders, shift work sleep disorder is a circadian rhythm sleep disorder due to unusual sleep patterns caused by changing work schedules. People with SWSD often characterized by insomnia, and excessive sleepiness during work hours.