Atopic dermatitis and stress
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Atopic dermatitis and stress as a symptom of the soul? Ten to 20 per cent of children and adults suffer from atopic dermatitis. The latest research findings on how stress influences atopic dermatitis.
Atopic dermatitis and itching as a mirror of the soul: when stress activates the immune system in atopic dermatitis and gets under the skin
Atopic dermatitis – formerly also known as endogenous eczema – has been regarded for decades as a prime example of a psychosomatic condition. The skin as a mirror of the soul – that sounds like a literary metaphor, but it has a solid biological basis. Anyone suffering from this chronic skin condition is familiar with the pattern: a period of exams, a conflict at work, persistent exhaustion – and a few days later, the rash flares up. For a long time, this correlation remained a clinical observation without a precise mechanistic explanation. A study from March 2026, published in the journal Science (Tian et al., DOI: 10.1126/science.adv5974), now provides the first clear molecular-level insight into how stress affects the body, from the brain to the skin.
How common is atopic dermatitis?
Atopic dermatitis is not a rare condition. According to estimates, 20 per cent of children and two to ten per cent of adults suffer from atopic dermatitis – meaning several million people in Germany. Ten to 20 per cent of all children show symptoms at least temporarily during their development, and ten per cent of adults suffer from atopic dermatitis to a clinically significant degree. Worldwide, over 200 million people are affected.
Formerly often referred to as neurodermatitis, atopic dermatitis is a chronic inflammatory condition that, due to severely itchy, inflamed eczema, results in a significant reduction in quality of life for those affected. The condition is immunologically driven: the immune system mistakenly attacks the body’s own skin structures. Genetic factors, environmental influences and – as has long been known clinically but scarcely understood mechanistically – psychological stress play a central role in this.
Symptoms and stress levels: a clinically recognised but mechanistically unclear link
The fact that psychological stress triggers or exacerbates flare-ups of atopic dermatitis has been documented in the dermatological and psychosomatic literature for decades. The link between stress and eczema was empirically evident, but the question of how remained largely unanswered. It was known that stress hormones – particularly cortisol via the hypothalamic-pituitary-adrenal axis – can modulate inflammatory processes and weaken the skin barrier. However, it remained unclear exactly what could intensify itching and trigger local inflammatory reactions in the skin, without evidence of elevated cortisol levels systemically.
This is where the current study comes in. As part of the study, Jiahe Tian and his team at Fudan University in Shanghai first analysed data from 51 people with atopic dermatitis. The participants recorded their stress levels and provided skin and blood samples. The result was clear: more stress – more severe skin symptoms. And not only that: in stressed patients, a specific subgroup of immune cells was markedly elevated – the so-called eosinophils.
Eosinophils: the immune cells at the heart of the stress response
Eosinophils are white blood cells that play a key role, particularly in allergic conditions and parasitic infections. They have long been recognised in atopic dermatitis – they migrate into inflamed skin tissue and release toxic proteins and messenger substances (pro-inflammatory cytokines, including interleukin-31), which exacerbate both inflammation and itching. Scratching in response to the resulting itch further damages the skin, thus creating a self-perpetuating cycle of inflammation and psychological stress. This phenomenon was known – what remained unknown was why stress selectively mobilises eosinophils, whilst other immune cells remain largely unaffected.
The study shows that this selectivity is no coincidence, but the result of a precise neural signalling pathway.
The signalling pathway: from the brain to the skin – the sympathetic nervous system as the control centre
By exposing the animals to severe stress and using a combination of imaging and genetic analyses, the team uncovered the link between stress and eczema and precisely mapped the connection between stress-signalling regions of the brain and the skin. The result is surprising in its specificity.
A key factor is a signalling pathway comprising a subgroup of sympathetic neurons: prodynorphin-positive (Pdyn+) noradrenergic nerve cells, which – unlike other sympathetic fibres – project specifically into hair-bearing skin regions. These regions are particularly common and severely affected in atopic dermatitis.
The sympathetic nervous system is part of the autonomic (vegetative) nervous system, which puts the body on high alert during periods of stress. It controls the well-known fight-or-flight response. The new study shows that the sympathetic nervous system also directly influences the cutaneous immune system via specific nerve fibres. During stress, these Pdyn+ neurons release noradrenaline, which acts on eosinophils via beta-2-adrenergic receptors, activating them. At the same time, the migration of eosinophils into the skin tissue is driven by the messenger substance CCL11 and its receptor CCR3. In the skin, the immune cells trigger the inflammatory cascade described above.
A direct neural pathway thus connects the brain and the skin – and this pathway does not run via the adrenal gland and the blood, but is peripheral, highly specific and site-specific.
An animal model confirms the mechanism of the skin disease.
Clinical observations in 51 individuals with atopic dermatitis formed the starting point. The mechanism was elucidated using a mouse model. When the researchers exposed the mice to stressful situations – such as placing them on an elevated platform – the number of eosinophils and inflammatory activity increased significantly. When they genetically disabled either the Pdyn+ neurons or the eosinophils themselves, the stress-induced inflammation ceased completely in the models. Management of the autonomic nervous system is therefore just as important as treatment of the skin surface – this conclusion follows directly from the mouse model.
Psychosomatics has been proven right – but not in the way the wellness industry portrays it.
At this point, a critical assessment that goes beyond neurobiology is warranted.
The findings of Tian et al. confirm what classical psychosomatic medicine – from Alexander and Mitscherlich to the modern biopsychosocial concept according to Engel – has been saying for decades: humans are not dualistic beings consisting of a disembodied spirit and a physical body. The skin as a mirror of the soul is not a romantic metaphor, but has a biological basis.
The study clarifies: it is not that ‘stress makes you ill’ in the sense of a vague causal claim, but rather that a defined level of psychological stress activates, via the sympathetic nervous system, a specific subtype of neuron which, via molecular messengers, triggers a defined inflammatory response in specific immune cells within specific skin regions. This is a fundamentally different statement from the wellness slogan “Stress is poison for the skin”.
The wellness industry utilises psychosomatic findings in a way that regularly leads to two errors: firstly, it simplifies causal relationships to a scientifically untenable degree. Secondly, it derives therapeutic interventions from this that ignore the biological complexity, ranging from “mindfulness cures autoimmune diseases” to “positive thinking strengthens the immune system”. This study does not present an argument against integrating stress reduction into dermatological treatment concepts. However, it does provide a clear argument against trivialisation: anyone who understands the signalling pathway from the brain to the skin at the cellular level now knows that this pathway cannot be directly addressed by breathing exercises or affirmations.
Therapeutic implications: treating stress as part of dermatology
The researchers themselves formulate the clinical conclusions cautiously but clearly: treating stress or blocking stress-dependent signal transmission between neurons and eosinophils, in combination with other therapies, could help alleviate dermatitis. The accompanying commentary in Science by Nicolas Gaudenzio and Lilian Basso (University of Toulouse) adds that psychological interventions – cognitive behavioural therapy, mindfulness, stress management – would be useful as integral components of dermatological care.
This is not a new idea. George Engel’s biopsychosocial model (1977) postulated precisely this for all chronic somatic diseases: biological, psychological and social factors are not additive, but constitutively intertwined. What the current study contributes is molecular evidence for a specific mechanism – and thus the argument that integrating psychosocial treatment approaches into dermatology is not a concession to psychosomatics, but rather evidence-based medicine.
Non-pharmacological approaches are also gaining credibility: if the sympathetic nervous system acts as a switch point, then interventions that dampen sympathetic activation – including certain relaxation techniques, physical exercise, and structured stress reduction – should not be viewed as complementary extras but as interventions targeting the described pathomechanism.
What the brain-skin axis tells us about ourselves
The fact that the skin is not merely a passive organ reacting to internal processes is not a new insight. Developmental biology knows that the skin and the nervous system share the same embryological origin – both arise from the ectoderm. Psychoanalysis has long drawn fruitful metaphorical insights from this connection: The skin as the first boundary between the self and the world, as an organ of contact and as the site of early attachment experiences (Didier Anzieu: ‘Skin-Ego’). Neuroscience and immunology now provide the molecular explanation for this.
The connection between the brain’s stress-signalling regions and the skin is no longer merely an analogy. It is a mapped signalling pathway with identified cell types, receptors and neurotransmitters. This is scientific progress. And it should be communicated with the appropriate precision – without the oversimplifying shortcuts all too often observed in wellness discourse.
Conclusion: Atopic dermatitis between molecular biology and the biopsychosocial model
The study by Jiahe Tian and colleagues does not fill a gap in the sense of providing a definitive explanation. It opens a window onto the complexity of skin-immune-nerve interactions. Psychological stress is not merely a subjective experience – it has a biological effect, via defined neural pathways, on specific immune cells. Atopic neurodermatitis was previously often referred to simply as neurodermatitis, as if the term had always implicitly acknowledged the neural dimension. The new research gives this intuition a molecular framework.
The treatment of this condition would do well to take this complexity seriously – and neither fall into biological reductionism, which ignores the psyche and social environment, nor into wellness vitalism, which replaces biological mechanisms with narratively satisfying but empirically unsubstantiated concepts.
Original study: Tian J et al. (2026). A sympathetic-eosinophil axis orchestrates psychological stress to exacerbate skin inflammation. Science, 391, 1269–1277. DOI: 10.1126/science.adv5974
Accompanying commentary: Gaudenzio N & Basso L (2026). A neuroimmune circuit links stress to skin inflammation. Science, 391, 1208–1209. DOI: 10.1126/science.aef7718
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