You Can't Eliminate Stress, But You Can Change What It Does to You
Pillar four of six in the lifestyle medicine series. Stress isn't something you can just remove from your life. But how you respond to it changes its effect on you. Here's what stress does to your body, how it ties into autoimmune disease and pain specifically, and what helps when you're in the middle of it.
Not all stress is bad
Some stress is useful. A work deadline, a workout, a hard conversation you've been avoiding, these create short-term stress that sharpens focus and pushes you to act. Psychologists call this eustress. The problem isn't stress itself, it's stress that doesn't resolve: the ongoing, low-grade kind that never fully turns off.
Most people already know the healthy ways to handle stress and the unhealthy ones. Movement, breathing exercises, talking to someone, creative outlets, that's the healthy list. Avoiding it, numbing out, turning to substances, that's the unhealthy list. Almost nobody needs this explained to them. The hard part isn't knowing what helps, it's doing it in the moment, when you're stressed.
There's a real reason for that gap. Acute stress temporarily impairs the prefrontal cortex, the part of your brain responsible for planning, judgment, and self-control, while strengthening more reflexive, automatic responses. In plain terms: the part of your brain that would remind you to go for a walk or call a friend is exactly the part that stress shuts down first. Knowing what to do isn't the hard part. Doing it while stressed is.
What chronic stress does to your body
It raises cardiovascular risk. Chronic stress keeps cortisol elevated, which drives inflammation, raises blood pressure, and contributes to plaque buildup in the arteries over time.
It weakens immune function. Prolonged high cortisol impairs immune cell production and function, leaving you more susceptible to infections and slower to recover from them.
It affects mental health directly. Chronic stress is strongly linked to anxiety and depression, and the relationship runs both ways, poor mental health also makes stress harder to manage.
It disrupts sleep and eating patterns, which pulls in the other pillars in this series along with it.
Where this connects to autoimmune disease
Stress doesn't just feel bad. In autoimmune disease, it appears to play a direct role in disease activity.
86% of RA patients identified stress as the most frequent cause of their joint symptom flares in one survey.
A 2025 meta-analysis found chronic psychological stress increases both the risk of developing RA and how often flares happen once you're diagnosed.
EULAR, the main European rheumatology group, has a formal guideline recommending psychological support, including cognitive behavioral therapy, be part of routine self-management for inflammatory arthritis.
The mechanism traces back to the hypothalamic-pituitary-adrenal axis (HPA axis), the same stress-cortisol system described above. It's the communication pathway between your brain and your adrenal glands that controls how much cortisol gets released in response to stress. In chronic stress, this system becomes dysregulated: cortisol's normal anti-inflammatory effect weakens, and the immune system shifts toward a more pro-inflammatory state. Research has specifically linked this dysregulation to the onset and worsening of rheumatoid arthritis, lupus, and multiple sclerosis.
It also runs in both directions. RA itself, the pain, the fatigue, the unpredictability, is a significant source of stress on its own. That means stress and disease activity can reinforce each other in a loop: more stress worsens the disease, and a worsening disease creates more stress.
There's a pain-specific piece too, one that connects directly to central sensitization, the same mechanism covered in the sleep post in this series. Stress lowers pain thresholds and contributes to the nervous system amplifying pain beyond what's happening at the joint. This is well documented experimentally in both animal and human studies. If stress makes your pain feel worse than your inflammation alone would explain, that's a real physiological effect, not something to dismiss.
What can help
The hard part is doing this in the moment, not knowing what helps. So the goal here is simple habits you can reach for under stress, not complicated ones you'll skip when you need them most. Daily practice is what makes that possible, not just pulling a tool out during a crisis. A skill you've already built is available to you under pressure. A skill you're learning for the first time in the middle of a stressful moment isn't. Regular practice also appears to lower your overall stress response over time, on top of making these tools easier to access when an acute stressor hits.
Breathing exercises. Slow, deep breathing activates the parasympathetic nervous system, your body's built-in brake on the stress response. It's simple, immediate, and available anywhere, which makes it a tool that works in the moment stress hits.
Movement. Exercise is one of the most consistently effective stress management tools available, and it's covered in more depth in the movement post in this series.
Meditation and mindfulness. The strongest evidence is for pain, not disease activity. Mindfulness-based stress reduction meaningfully lowers pain intensity and depression across chronic pain conditions, and it's improved quality of life in MS and lupus too. In RA specifically, it hasn't been shown to change disease activity, but it does reduce psychological distress. It helps you cope and feel better, even when it doesn't move the disease markers.
Creative outlets. Arts, crafts, music, anything that absorbs your attention fully tends to interrupt the stress response the same way mindfulness does.
Reading. A low-tech, accessible way to shift attention away from a stressor, especially before bed.
Talking to a therapist. Not just for crisis moments. A therapist can help build the specific coping skills that are hardest to access on your own in the middle of a stressful moment.
None of these have to be perfect or elaborate. The best stress management tool is the one you'll use when you're stressed, not the one that looks best on paper.
Bottom line
Stress isn't optional, and it isn't something to eliminate entirely. What matters is having a small number of tools you can reach for when it hits, not just a list of things you know you're supposed to do. If you want to go deeper on any of this, I've got more resources on the Resources tab of the website.
Next up, pillar five: avoiding risky substances.
Sources
"Chronic Stress and Autoimmunity: The Role of HPA Axis and Cortisol Dysregulation." Review of how chronic stress and HPA axis dysfunction contribute to autoimmune disease, including RA, lupus, and multiple sclerosis.
"Rheumatoid arthritis in crisis: investigating the impact of stress on RA flares during the COVID-19 pandemic." Clinical Rheumatology, 2025. Found pandemic-related stress associated with increased RA flares.
"Can Stress Cause Rheumatoid Arthritis? The Link Explained." Citing a 2025 meta-analysis in Autoimmunity Reviewsfinding chronic psychological stress increases both RA onset risk and flare frequency.
HealthCentral, "How to Prevent Stress from Making Your Rheumatoid Arthritis Worse." Cites patient-reported data that 86% identify stress as the most frequent cause of joint symptom flares.
Marques A, Santos E, Nikiphorou E, et al. "2021 EULAR recommendations for the implementation of self-management strategies in patients with inflammatory arthritis." Annals of the Rheumatic Diseases, 2021. The formal EULAR guideline recommending psychological support and CBT as part of routine self-management.
Arnsten AFT. "Stress signalling pathways that impair prefrontal cortex structure and function." Nature Reviews Neuroscience, 2009. The foundational research on how acute stress impairs prefrontal cortex function and executive control.
Institute for Chronic Pain. "What is Central Sensitization?" Summary of research linking the stress response to lowered pain thresholds and central sensitization.
Pradhan EK, et al. "Effect of Mindfulness-Based Stress Reduction in rheumatoid arthritis patients." Arthritis Care & Research, 2007. A randomized controlled trial finding no effect on RA disease activity but significant reduction in psychological distress at 6 months.
"Which type and dosage of mindfulness-based interventions are most effective for chronic pain? A systematic review and network meta-analysis." ScienceDirect, 2025. Found mindfulness-based stress reduction produced the strongest, most consistent improvements in pain intensity and depression across chronic pain conditions.
Simpson R, et al. "A systematic review and meta-analysis exploring the efficacy of mindfulness-based interventions on quality of life in people with multiple sclerosis." Journal of Neurology, 2022. A meta-analysis of 14 randomized trials finding mindfulness improved quality of life in MS.
"The Effectiveness of Mindfulness-based Cognitive Therapy on Psychological Symptoms and Quality of Life in Systemic Lupus Erythematosus Patients: A Randomized Controlled Trial." Found mindfulness-based cognitive therapy improved psychological symptoms and quality of life in lupus patients.
Chronic Stress, Diabetes, and Cardiovascular Disease: Epidemiologic Evidence, Pathogenetic Insights, and Therapeutic Strategies. Review of the HPA axis, cortisol, and cardiovascular risk mechanisms.
