Many people sleep worse in winter. Here's what experts want you to know.

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• Winter insomnia affects sleep quality during colder months.
• Causes include reduced daylight and stress from the holiday season.
• Bright light exposure and light therapy can help manage symptoms.

It's normal to feel sluggish during the winter. Cold temperatures and fewer hours of sunlight can mean less time outdoors and more time staring at our screens.

For some people, these cold-weather habits may contribute to a sleep disruption, known as winter insomnia.