The 24-hour darkness during the winter near the Poles can disrupt sleep – this is how the people who live there cope.

Many children become afraid of sleeping in the dark - usually from the age of three upwards - so this fear in itself is not unusual in your daughter. It can be sparked off by a scary story or ...

The SCN then activates certain hormones, alters your body temperature, and regulates your metabolism to keep you alert or draw you to sleep. Although light and dark have the most significant ...

Dermatologists suggest that having dark undereye circles should be checked as they aren't just signalling a lack of sleep. "Deficiencies of vitamins D, K and E and some vitamin Bs could be the ...

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