You feel exhausted, vaguely unwell, and when a friend texts about meeting up, you find yourself suggesting a group chat instead. A study published in Scientific Reports suggests this behaviour might not just be about mood or preference — it could be your immune system at work.
Researchers at Ohio State University measured inflammation levels in college students and tracked how they spent their social time. Students with higher levels of C-reactive protein, a marker of systemic inflammation, tended to spend more time on social media for social purposes and less time in face-to-face interactions. The pattern was strongest among students who scored high on introversion or neuroticism.
What the researchers measured
Deborah Lee, Ting Jiang, and Baldwin Way recruited college students who provided blood samples to measure CRP, a protein the liver produces in response to inflammation. Levels rise during infections, injuries, or chronic low-grade inflammation. The students also filled in questionnaires about their personality traits, how much time they spent on social media, and how often they met friends in person.
The team found that higher CRP levels were associated with a preference for social media over face-to-face interaction. Students with elevated inflammation were more likely to use social media specifically to connect with others, rather than to meet in person. This association held even after controlling for age, sex, body mass index, and general social media habits unrelated to interaction.
The relationship between inflammation and social media use was not uniform. It was considerably stronger in students who described themselves as introverted or who scored high on neuroticism — a personality dimension linked to worry, emotional sensitivity, and vigilance toward threat.
Why inflammation might change how you socialise
When your body detects a threat — an infection, tissue damage, or prolonged stress — it activates inflammation as part of the immune response. This response conserves energy by promoting fatigue and withdrawal. In evolutionary terms, this made sense: a sick animal lying still in a safe place was more likely to survive than one expending energy in group activities.
The authors write that inflammation may prompt a shift toward less energy-demanding forms of social contact. Social media allows connection without the physical effort of meeting someone, without navigating unpredictable social cues in real time, and without the vigilance required in face-to-face settings where the interaction cannot be paused or edited.
For people already inclined toward introversion or neuroticism, this shift may be especially appealing. Introverts find face-to-face socialising more tiring even under normal conditions. People high in neuroticism are more sensitive to social threat and rejection. When inflammation adds fatigue and heightened sensitivity to the mix, social media becomes not just convenient but protective.
What this study can’t tell you
This was a cross-sectional study — a snapshot taken at one point in time. It cannot show whether inflammation causes the shift to social media, whether spending less time face-to-face raises inflammation, or whether some third factor drives both. Loneliness and social isolation are themselves associated with inflammation, so the relationship could run in multiple directions at once.
The sample was college students at one American university. The findings may not generalise to other ages, cultures, or people with diagnosed anxiety disorders. CRP is a general marker of inflammation and does not identify what is causing it — whether infection, injury, chronic stress, poor sleep, or metabolic factors.
The effect sizes were small to moderate, meaning inflammation explains part of the variation in social behaviour but certainly not most of it. Many students with elevated CRP still spent plenty of time face-to-face. Many with low CRP preferred social media. Personality, habit, circumstance and dozens of other factors matter more than inflammation for most people most of the time.
When to pay attention to the pattern
If you notice a sustained drop in your appetite for in-person contact alongside other signs of inflammation — persistent fatigue, unexplained aches, low mood that does not lift — it is worth discussing with a doctor. Chronic low-grade inflammation can result from poor sleep, prolonged stress, untreated infection, autoimmune conditions, or metabolic issues, all of which have treatments.
The study does not suggest that social media use is harmful or that face-to-face interaction is always better. The authors frame social media as an “energy efficient, mediated communication tool” that might serve an adaptive function when physical or psychological resources are low. The question is whether it becomes the default when you would otherwise benefit from the richer feedback and support that face-to-face contact provides.
For therapists working with socially anxious or withdrawn clients, the findings suggest that physical health factors — sleep, exercise, diet, chronic stress — might be worth addressing alongside exposure or cognitive techniques. If inflammation is quietly tilting someone’s social decisions away from the interactions that would help them most, treating the underlying health issue could make psychological interventions more effective.
The research also raises the possibility that some of what we interpret as social anxiety or avoidance might have a biological component that shifts over time. On days when inflammation is higher — perhaps due to poor sleep, a minor illness, or acute stress — the same person might find face-to-face interaction more effortful and social media more appealing. That does not make the avoidance less real, but it does suggest that the intensity of the urge to withdraw is not fixed.
If you need support
If you are in immediate danger, contact your local emergency number.
- United States — 988 Suicide & Crisis Lifeline: call or text 988
- United Kingdom — Samaritans: 116 123 (free, 24/7)
- International — findahelpline.com
Sources
- Lee DS, Jiang T, Way BM (2026). Inflammation is associated with greater social media use over face-to-face interaction, especially among individuals high in introversion or neuroticism. Scientific Reports. https://doi.org/10.1038/s41598-026-39242-8
Published for general education. This article is not medical advice, diagnosis or treatment. If you are struggling, speak to a qualified professional.