12 Ways Your Relationship Can Hurt Your Health

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Stress levels

Surprise, surprise: Regular physical intimacy appears to reduce stress and boost well-being. One study, published in 2009 in the Journal of Sexual Medicine, found that people who frequently had sex were healthier mentally and more likely to report greater satisfaction with their relationship and life overall.

Sex is just one aspect of a relationship, however. And your partner's behavior outside the bedroom can just as easily send stress levels soaring in the opposite direction. Parenting disputes, disagreements over money, or even questions as simple as who does which household chores have been shown to increase stress.

Next: Feel-good hormones