Almost two-thirds of Brits suffer from some sort of sleep problem, according to a late survey.
Issues such as insomnia, teeth-grinding or sleep apnoea, were found in the largest British study of its kind.
The findings, of more than 5300 people polled, revealed that only 39% of adults sleep well.
The Great British Sleep Study showed that the biggest problem is insomnia, with some 37% of people suffering from an inability to get to sleep, or get back to sleep after waking in the night.
Another 24% have other sleeping problems including teeth-grinding, sleeping too much and sleep apnoea; in which the airway is temporarily obstructed and a person can struggle for breath.
The survey, by the Mental Health Foundation Charity, identified the heavy toll that poor sleeping can have on personal health and wellbeing.
Dr Andrew McCulloch, chief executive of the Mental Health Foundation, said “Whilst great emphasis is rightly placed on the importance of diet and exercise, sleep has for too long been neglected as a major influence on the physical and mental health of the nation.”
Not enough sleep over the long term has also been linked to health problems such as heart disease, obesity and diabetes.
It discovered that insomniacs are four times more likely to have relationship problems than those who get enough rest and three times more likely to have depressed moods.
They are three times more likely to lack concentration during the day and more than twice as likely to suffer from low energy.
Prof Colin Espie, director of the Glasgow University Sleep Centre, said: “The Great British Sleep Survey data show the extent to which sleep disorders can inhibit the very essence of who we are: our relationships, our mood, our ability to complete day-to-day tasks.”