Sleep is an essential part of life: you can relax while still awake, but the brain cannot shut down and rest unless you sleep. Sleep is therefore essential for good health, and any difficulties with sleep may be both a cause and a symptom of mental health problems.
What causes sleep problems?
The most common causes of insomnia are:
-Physical disturbance such as noise, inappropriate light levels, physical discomfort.
-Drinking stimulating drinks such as coffee, or smoking, just before bedtime.
-Taking vigorous exercise just before bedtime.
-Eating a large meal close to bedtime.
-Shift work or jet lag.
-Taking naps in the daytime, especially if late in the day