What Causes a Lack of Sleep?

In addition to various sleep disorders (discussed below), a range of other factors can cause a lack of sleep. For example:

Caffeine
Antidepressants, smoking, and alcohol
Changes in life style, such as shift work changes
Back and neck problems
Environmental noise
Sciatica (pain in the leg)
Incontinence

These can each cause a loss of sleep and/or disturbed sleep. In addition, various drugs can affect the ratio of the various stages of sleep, thus affecting the overall quality of sleep.

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