DAVID NICHOLLS / SCIENCE PHOTO LIBRARY DAVID NICHOLLS / SCIENCE PHOTO LIBRARY
Insomnia. Computer artwork of sheep leaping over a person's head to illustrate insomnia. In the background are crescent moons. Insomnia is a sleep disorder characterised by an inability to sleep or remain asleep for an adequate length of time. Insomnia can lead to fatigue, poor concentration and memory loss. Treatments include sleeping tablets and herbal remedies. Traditional cures include exercising in the afternoon, having a light evening meal and drinking warm milk at bedtime.
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