Most people recognize that certain relationships feel draining. The coworker who thrives on conflict, the relative who brings tension to every gathering, or the friend who leaves you feeling criticized rather than supported. These dynamics take an emotional toll. Emerging research suggests they may also take a biological one.
A recent large-scale study examining adults across a wide age range found that nearly 30% of people report having at least one chronically stressful person in their social network. Researchers referred to these individuals as “hasslers”—people who consistently create strain rather than occasional disagreement.
Using saliva samples and advanced tools known as epigenetic clocks, scientists measured biological aging at the molecular level. These clocks assess chemical changes in DNA that reflect how quickly the body is aging compared to chronological age. The findings were striking: each additional high-stress relationship was linked to a 1.5% faster pace of biological aging and roughly nine extra months of biological age.
To put that into perspective, the effect of one ongoing difficult relationship was measurable and meaningful—compounding over time in ways that may influence long-term health.
The Ripple Effects of Chronic Relational Stress
The impact extended beyond DNA markers. Individuals with more stressful connections were also more likely to report:
- Higher levels of anxiety and depression
- Poorer self-rated health
- Elevated body mass index (BMI)
- Greater waist-to-hip ratios
- Increased markers of inflammation
These patterns suggest that chronic relational stress may contribute to wear and tear on the body, sometimes referred to as allostatic load, which is the cumulative burden of ongoing stress.
Importantly, this research focused on persistent patterns of strain, not normal disagreements. Conflict happens in every relationship. What appears to matter most is repeated, unresolved stress that becomes part of daily life.
Not All Difficult Relationships Carry the Same Weight
One of the most compelling findings involved relationship type. Stressful family relationships, particularly with parents, siblings, or adult children, had the strongest association with accelerated aging.
Family dynamics can be uniquely complex. They often carry lifelong history, emotional intensity, and a sense of obligation that makes distancing difficult. Unlike a coworker or acquaintance, family members are typically embedded in one’s life in ways that are harder to step back from. When those relationships are chronically strained, the body may remain in a prolonged stress response.
Non-family stressors, such as coworkers or acquaintances, also showed measurable effects, though somewhat weaker. Even relationships considered “peripheral” can leave a biological imprint if they are consistently stressful.
Spousal strain did not show the same clear link to accelerated aging in this study. One possible explanation is that marriage often includes a blend of stress and support. A spouse who causes frustration may also provide companionship, shared history, and practical help. That balance may buffer some of the biological impact seen in other strained relationships.
Beyond Loneliness: The Other Side of Social Health
Public health conversations in recent years have focused heavily on loneliness and isolation. Those concerns are valid. Social disconnection is linked to significant health risks. However, this research highlights another dimension: it is not only the absence of relationships that affects health, but also the presence of chronically stressful ones.
A large social network does not automatically equal protection. If key relationships consistently trigger stress, the body may pay the price.
The study also uncovered important patterns. Women, individuals in poorer health, smokers, and those who experienced adversity in childhood were more likely to report having stressful people in their lives. This suggests a form of relational inequality, where social and health vulnerabilities can cluster together, potentially amplifying risk over time.
What This Means for Everyday Life
While it is not realistic or even healthy to expect conflict-free relationships, it may be worthwhile to reflect on patterns of persistent stress. Consider:
- Which relationships consistently leave you feeling tense, drained, or diminished?
- Are there boundaries that could reduce exposure or intensity?
- Is support available to help navigate complex family dynamics?
For family relationships in particular, boundaries can feel uncomfortable but necessary. Limiting time, redefining expectations, or seeking therapy may reduce chronic stress exposure.
