Myth #3: Insomnia means difficulty falling asleep.

迷思3，失眠是入睡困难

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Difficulty falling asleep is just one of its four symptoms.

难以入睡只是四大症状之一。

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This could result from difficulty falling asleep, staying asleep or waking prematurely.

症状的表现是，难以入睡，难以起床，或过早起床。

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The most common sleep problems in children are difficulty falling asleep and staying asleep and overall insufficient shut-eye.

WSJ: More Children With Sleep Problems Seek Overnight Tests

Last week, a nutritionist -- Cherilyn Lee -- said Jackson pleaded for the drug despite being told of its harmful effects, because he had difficulty falling asleep.

CNN: Sources: Jackson showed signs of IV drug use

According to the National Sleep Foundation's 2004 Sleep in America poll, 13% of school-age children have difficulty falling asleep at bedtime and 26% of preschoolers seem sleepy or overtired during the day at least a few days a week.

WSJ: How Much Sleep Do Children and Teenagers Need? Grown-Up Problems Start at Bedtime