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4. One Possible Cause of Sundown Syndrome

Some scientists believe sundown syndrome is associated with the circadian rhythm, a 24-hour process involving the brain and neurotransmitters that help people stay awake during the day and sleep at night. Researchers think that as the circadian rhythm shifts, as night approaches, it may somehow cause the symptoms of sundown syndrome. Feeling tired at the end of the day may also exacerbate confusion and irritability.

sleep bedtime sundown syndrome AzmanL / Getty Images

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