Stress does not cause eczema, but it is one of the most common triggers for flare-ups. No one knows exactly what causes eczema. The condition involves a combination of genetic factors, immune system dysfunction, and environmental exposures. What stress does is reliably make existing eczema worse, and the biological reasons for that are well understood.
Why Stress Makes Eczema Worse
When you’re stressed, your brain activates a hormonal chain reaction called the HPA axis. This system releases cortisol and other stress hormones into your bloodstream. In small, short-lived doses, cortisol actually reduces inflammation. But when stress becomes chronic, those same hormones start working against you. They weaken your skin’s protective barrier, shift the balance of bacteria in your gut, and promote inflammation throughout your body, including your skin.
A study on healthy women found that even brief psychological stress (an interview-style task) delayed skin barrier recovery and increased levels of several inflammatory signaling molecules in the blood. The more inflammatory molecules the participants produced in response to stress, the worse their skin barrier performed. For someone with eczema, whose skin barrier is already compromised, this effect is amplified. The skin becomes drier, more porous, and more reactive to irritants that might not bother it on a calmer day.
Stress hormones also trigger the release of neuropeptides, small chemical messengers that can activate immune cells in the skin. These immune cells release their own inflammatory compounds, producing redness, swelling, and intense itching even without any external irritant touching the skin. This is why a stressful week at work can seemingly cause a flare out of nowhere.
The Itch-Anxiety Cycle
One of the most frustrating aspects of stress-related eczema is that it feeds on itself. Stress triggers itching, itching causes scratching, scratching damages the skin and worsens the eczema, and worsening eczema creates more stress. Researchers describe this as a “vicious cycle” with both physical and psychological components.
The psychological side is more powerful than most people realize. Paying close attention to bodily sensations heightens your perception of itch, while distraction measurably reduces it. Anxiety and fear can amplify itch signals through something similar to the nocebo effect, where expecting something to feel worse actually makes it feel worse. This means that worrying about a flare can, in a very real sense, help bring one on.
Scratching also takes on a unique role in eczema that it doesn’t have in most other chronic conditions. With eczema, the patient’s own behavior (scratching) directly worsens the skin damage and perpetuates the itch. This creates a loop where the emotional distress of having eczema becomes one of the forces driving it forward. Chronic itch is associated with higher levels of anxiety, and anxiety in turn makes itch harder to tolerate.
What Causes Eczema in the First Place
The National Institute of Allergy and Infectious Diseases states plainly: “No one knows what causes eczema.” What researchers do know is that the condition runs in families and is closely linked to mutations in genes responsible for building and maintaining the skin barrier. People with eczema tend to produce less of the natural fats that keep skin sealed and hydrated, leaving gaps that allow moisture to escape and irritants to enter.
The immune system also plays a central role. In eczema, the immune response in the skin is overactive, treating harmless substances like dust, pet dander, or certain fabrics as threats. This overreaction produces the redness, swelling, and itching characteristic of flares. Stress is one of many environmental factors that can set off this exaggerated immune response, alongside heat, sweat, dry air, certain soaps, and allergens. These triggers vary from person to person.
Managing Stress to Reduce Flares
Since stress is a modifiable trigger, managing it can meaningfully reduce how often and how severely eczema flares. This doesn’t mean eliminating stress entirely, which isn’t realistic. It means building habits that lower your baseline stress level and interrupt the itch-anxiety cycle before it escalates.
Techniques that have shown benefit for eczema patients include mindfulness meditation, progressive muscle relaxation, and cognitive behavioral therapy. These work in part by reducing HPA axis activation and in part by breaking the attentional loop where focusing on itch makes it worse. Regular exercise, consistent sleep, and limiting caffeine also help regulate the stress hormones that drive skin inflammation. Sleep deprivation in particular has been shown to disrupt skin barrier function on its own, compounding the effects of psychological stress.
Keeping a flare diary can help you identify your personal pattern. If you notice that flares consistently follow periods of high stress (deadlines, conflicts, poor sleep), that’s useful information. It doesn’t mean you can prevent every flare through relaxation alone, but it does mean stress management belongs alongside moisturizers and topical treatments as part of your overall approach. For some people, addressing the stress component makes a noticeable difference in how well their other treatments work.