The study suggests that the benefits of sharing information appear to be one-sided, as it does nothing for the other person's mental health.
The findings are based on study, led by Dr Andrea Horn, of the University of Fribourg, Switzerland.
The study, conducted to determine whether telling your partner everything was good for your psychological health, involved 80 couples.
"It's likely that telling your partner about your day enables you to better regulate your own emotions, which results in these positive psychological health effects," the Telegraph quoted her, as saying.
"It may also promote feelings of intimacy, which increases relationship satisfaction. However it was interesting we didn't find the same effects for the other person.
"It could be the process of telling someone about your daily events, not the response, that matters. So you may want to share more with your partner - if not for their benefit, then for your own," she added.
The study will be presented at the British Psychological Society's conference at Bath University.