Sleep is closely connected to mental and emotional health and has demonstrated links to depression, anxiety, bipolar disorder, and other conditions.
In adults, a lack of sleep has been associated with daytime sleepiness, impaired thinking and memory, and mental health problems such as depression and anxiety.
Mental health disorders tend to make it harder to sleep well. Poor sleep, including insomnia, can be a contributing factor to the initiation and worsening of mental health problems.