Sleep may make it harder to forget bad thoughts.
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The age-old advice to “never go to bed angry” is getting some support from new research.
Researchers found that men in the study were less able to suppress a negative memory after they slept than they were before they slept.
Normally, sleep helps people process information from the day and store it in their memory. The new finding suggests that this process of solidifying memories during sleep also makes it harder to suppress negative memories, which people may not want to recall.