Most adults are recommended between 7-9 hours per night. Constantly sleeping fewer hours may cause sleep deprivation, which can lead to several health complications. The condition may develop due to sleep disorders (insomnia, sleep apnea, narcolepsy, etc.), aging, illnesses such as depression, schizophrenia, chronic pain syndrome, cancer, etc., or due to other factors such as stress or change in schedule. To try and manage sleep deprivation, here are 10 warning signs to note: Reduced productivity and performance Chronic sleep deprivation hinders the body’s ability to think, function, or perform to its full potential. Sleep deprivation may also impact one’s ability to read social situations and make good decisions. This can hamper productivity and performance. According to certain studies, nighttime sleep and dreaming promote new learning and memory consolidation and improve creativity. While caffeine can help improve productivity momentarily, sleeping will help soak in information more effectively. Insatiable appetite According to a study conducted in 2004, those who sleep for 6 hours or less per night are likely to have reduced levels of the appetite-suppressing hormone leptin. They are also more likely to have increased levels of the hunger-stimulating hormone ghrelin. This development will likely cause more nighttime cravings and increase the risk of lifestyle diseases like diabetes.