By Nick Collins, Science Correspondent 7:30AM GMT 18 Jan 2012
Sleeping on a problem could make matters even worse as it causes painful memories to remain more vivid, a new study claims.
Researchers found that unpleasant experiences stay more upsetting if we sleep immediately after the event than if we digest the memory while still awake.
The study contradicts previous papers which claim that sleeping helps us take the edge off negative emotions and view them from a more rational perspective.
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