Sleep and depression are so intertwined that it\u2019s hard to know if one causes the other or if they\u2019re just associated.\nBoth insomnia and sleeping too much are symptoms that can help diagnose depression. Excessive fatigue during the day, called hypersomnia, is also a signal.\nSleep isn\u2019t just something you do to feel alert during the day. It also allows your body to perform necessary biological repairs, affecting your immune systems, heart health, and other cell functions. Researchers and clinicians still aren\u2019t sure what the exact relationship is between sleep and depression, but they do know there\u2019s a link.\nLet\u2019s start with a few statistics:\n\nAt some point in their lives, depression will affect 25 percent of women and 10 percent of men.\nA study published in the journal Dialogues in Clinical Neuroscience found that about 75 percent of patients with depression also have insomnia.\nThose with insomnia have a 10 times greater risk of developing depression than those who sleep well, says the National Sleep Foundation (NSF).\n\nLearn more about adult depression and anxiety from Behavioral and Mental Health Services at UPMC. \nCan Lack of Sleep Complicate Depression?\nIf you\u2019ve ever had a bad night of sleep, you probably know you don\u2019t function well afterwards. A lack of sleep can impair your emotional regulation and thinking, which can intensify depression and other psychiatric diagnoses.\nAccording to a study in the British journal Lancet Psychiatry, people with diagnosed mental health disorders showed improvement from an increased amount and quality of sleep.\nResearchers aren\u2019t sure exactly how this happens, but sleep disruption probably affects your stress hormones and neurotransmitter levels. Studies have shown that long-term insomnia can also cause depression later on, according to Dialogues in Clinical Neuroscience.\nPeople who are naturally night owls may be at a greater risk of depression than those who rise early, though clinicians do not yet understand why this may occur. A recent study on delayed sleep phase disorder (people who are extreme night owls) reported that a circadian misalignment might be linked to depression.\nIf you have trouble adapting to a work or school schedule, you should seek help from a sleep health professional.\nContact Western Psychiatric Institute and Clinic at \u200b1-877-624-4100 or 412-624-1000.\nHow Does Depression Affect Sleep?\nDepression can affect a number of bodily functions, like decreased appetite and libido loss, and make it more difficult to fall asleep. Sadness, hopelessness, and other feelings that come with depression may take over a person\u2019s thoughts as he tries to fall asleep.\nHow does depression affect sleep? If someone is tired during the day, he or she may want to nap, which can then affect nighttime sleep. Even getting off a regular sleep schedule can affect a person\u2019s body. While some people don\u2019t sleep enough, depression and sleeping a lot is also common.\nTalk to Your Doctor About Depression and Sleep Issues\nIf you\u2019re experiencing depression, sleep disturbances, or both, it\u2019s important to seek help.\nIt\u2019s also important to talk to your doctor if you\u2019re experiencing depression and hypersomnia, or excessive sleepiness. The Centers for Disease Control and Prevention found that fewer than 20 percent of Americans who had moderate depressive symptoms had seen a mental health practitioner in the previous year. Medicines and therapy usually can help reduce depression and improve sleep.\nIt\u2019s also possible there\u2019s a more direct link between sleep and depression. People successfully treated for obstructive sleep apnea experienced lasting and reduced depression symptoms, according to the NSF. A sleep study can determine whether or not you have sleep apnea.\nBefore seeing a doctor about depression and sleep issues, it\u2019s helpful to track your sleep for a few weeks so you can share examples of your sleep schedule, sleep quality, and how you felt emotionally during that time.\nThe doctors at UPMC can help you sleep better and tackle your depression. Whether you\u2019re suffering from depression and sleeping a lot or not getting nearly enough rest, there\u2019s no need to suffer alone.