Sleep Quality Shapes Jealousy in Insecure Relationships

A recent study presented at the SLEEP 2025 conference reveals a fascinating link between sleep quality and emotional reactions in relationships. Researchers found that poor sleep quality correlates with increased jealousy, but only in individuals with high attachment anxiety—those who already struggle with insecurity and low self-esteem in their relationships.

Here’s what they discovered:

• Participants with anxious attachment styles reported significantly worse sleep quality

• Among these individuals, a bad night’s sleep led to more feelings of jealousy the next day. This pattern wasn’t seen in those with secure attachment styles.

• The study underscores that attachment style moderates how sleep influences our emotions, implying that personalized sleep or relationship support could be especially beneficial for some

Quick Tip: If worry or insecurity keeps you up at night, try a bedtime check-in—write down thoughts that are on your mind before sleep. This journaling ritual can help reduce emotional reactivity and promote more restful sleep.

Taking care of your brain starts with small, consistent choices.