What is the brain-skin connection?

The brain-skin connection refers to the bidirectional communication between the central nervous system and the skin. Because the brain and skin share a common embryological origin — both develop from the ectoderm — they remain intimately linked throughout life. Stress hormones, neuropeptides, and immune signals travel between the brain and skin continuously, meaning that psychological states like stress, anxiety, and depression can directly trigger or worsen skin conditions, and vice versa.

What is psychodermatology?

Psychodermatology is a medical subspecialty at the intersection of psychiatry and dermatology. It addresses the reciprocal relationship between the mind and skin, recognizing that psychological states can cause or worsen skin diseases, and that skin conditions can in turn trigger significant mental health consequences. There are four main categories: psychophysiological disorders (e.g. acne, eczema worsened by stress), primary psychiatric disorders (e.g. skin picking, trichotillomania), secondary psychiatric disorders (e.g. depression caused by psoriasis), and miscellaneous neuroses.

How does stress affect the skin?

Stress triggers the release of cortisol and other stress hormones that directly impact skin function. Approximately 50% of people with acne report an emotional trigger to their breakouts, at least 80% of those with eczema say psychological stress aggravates their itch, and around 90% of those with rosacea report stress triggers a flare-up. Stress also suppresses immune function and promotes chronic inflammation, which underlies most major skin conditions.

What is the role of touch in skin and brain health?

Touch activates specialized slow-conducting nerve fibers called C-tactile (CT) fibers, which carry signals to the insular cortex — the brain region associated with positive feelings and social bonding. Gentle touch, such as that delivered during a facial massage, reduces cortisol levels and stimulates the release of oxytocin, a hormone linked to trust, bonding, and stress reduction. This is the neurological basis for why touch-based therapies have measurable effects on both mental and skin health.

Who is Dr. Claudia Aguirre?

Dr. Claudia Aguirre is a PhD neuroscientist from the University of Southern California, specializing in the brain-skin connection, psychodermatology, and neurocutaneous science. In 2009, she became the first PhD neuroscientist to work in the professional beauty industry, joining Dermalogica. She is a TEDx UCLA speaker whose talk 'The Hidden Brain in Your Skin' has been viewed by millions worldwide, a published researcher in peer-reviewed journals, and an invited lecturer at Stanford University. She is currently developing a book on the brain-skin connection for a general audience.

What is neurocutaneous science?

Neurocutaneous science is the study of the interactions between the nervous system and the skin. It encompasses the neurobiology of touch, the role of neuropeptides and stress hormones in skin conditions, and the relationship between psychiatric health and dermatological disease. It forms the scientific foundation of psychodermatology and informs approaches to skin health that address both the brain and the skin simultaneously.

Can skin conditions affect mental health?

Yes. Highly visible skin conditions such as psoriasis and vitiligo are associated with significantly elevated rates of depression and anxiety. In psoriasis patients with associated depression, research has found that 5.5% reported active suicidal ideation, underscoring the serious mental health burden that skin disease can carry. This bidirectional relationship — where skin affects mind as much as mind affects skin — is at the core of the psychodermatological approach.

What is neuroaesthetics?

Neuroaesthetics is the scientific study of how the brain perceives and responds to beauty, sensory experience, and aesthetic stimuli. It explores why certain textures, colors, scents, and touches feel pleasurable or aversive — and what happens in the brain when we experience them. In the context of skin and beauty, neuroaesthetics informs how products, treatments, and environments can be designed to activate positive neurological responses, reduce stress, and enhance wellbeing at a biological level.

The Brain-Skin Connection: Neuroscience of Psychodermatology

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The Brain-Skin Connection

About This Research

Dr. Claudia Aguirre, PhD, is a neuroscientist and one of the earliest researchers to bring the neuroscience of the brain-skin connection into the beauty and wellness industry. In 2009, when she joined Dermalogica as their first in-house neuroscientist, she was the only PhD neuroscientist working in professional beauty — at a time when psychodermatology was barely a footnote in dermatology curricula, let alone beauty. Over the following years, she helped establish neurocutaneous science as a legitimate lens for understanding skin health, stress-related skin disorders, and the neurobiology of touch and sensory experience.

Her academic background is focused on neuroendocrinology in learning & memory, as it relates to brain aging and longevity. An alumna of UCLA, USC and NIMH, Dr. Aguirre's scientific contributions continue to pave the way for innovative research and practices that bridge the gap between neuroscience and wellbeing.

Her TEDxUCLA talk, "The Hidden Brain in Your Skin," introduced these ideas to a global audience and has since been viewed by millions worldwide. Her peer-reviewed research on psychodermatology and the skin-brain connection adds to the growing academic literature on the brain-skin-gut system.

She is currently developing a book on the brain-skin connection for a general audience — drawing on decades of research, clinical observation, and brand collaborations — currently with major publishers.

The Hidden Brain in Your Skin

In this revelatory TEDx talk, Dr. Claudia Aguirre uncovers the hidden intelligence of skin, how stress and trauma physically rewrites the surface of the body, and what the neuroscience of touch tells us about healing.

Watch: The Hidden Brain in Your Skin — TEDxUCLA

How Your Mind Influences Your Skin

Emotions play a big role in skin diseases. Approximately 50% of people with acne report an emotional trigger to their breakouts. At least 80% of those with atopic dermatitis (eczema) state psychological stress aggravates or brings about their itch. Around 90% of those with rosacea say stress triggers a flare-up, making their skin hypersensitive. And about 100% of those with excessive sweating, hyperhidrosis, say emotions trigger their reaction. Recurrent flares of psoriasis have been attributed to stress in up to 80% of individuals. What’s more, in psoriasis patients with associated depression, 5.5% reported active suicidal ideation.

Emotions, in particular stress and anxiety, are not to be dismissed when it comes to treating the skin. Not only can they trigger or exacerbate skin conditions, but they can actually affect a person so deeply that they are scarred for life, or worse yet, make them want to take their own life. In understanding the intimate relationship between the mind and skin, you will be better equipped to manage your own skin concerns, from the inside out.

A close-up of a person with their hand gently touching their neck and chin, with visible lips and jawline, against a dark background.

Close-up of a woman's back and shoulders with water droplets on skin, wet hair visible at the top.

A person with medium brown skin washing their hands with soap and water, creating soap suds.

Close-up of a shoulder with a dollop of white lotion or cream on the skin.

A mind-body approach

The notion that there is a definitive mind-body relationship is not new. From the ancient Greeks, to Shakespeare, to 19th century dermatologists the mind-body connection has been a topic discussed for centuries. Eastern healing practices, such as traditional Chinese medicine and Ayurvedic medicine also highlighted the interdependence between the mind and the body. Somewhere along the lines in Western medicine, we lost this connection, focusing instead on philosophies that treated the body as a separate entity from the mind. It’s only been in the past several decades that we’ve seen the resurgence of mind-body awareness in medicine — And only in the past decade or so have we seen an emphasis on understanding the interaction between the mind and skin diseases with modern neuroscience techniques.

Psychodermatology

Psychodermatology is a new medical subspecialty that merges two major medical specialties: psychiatry and dermatology. Psychiatry treats mental processes manifested internally, while dermatology treats skin diseases manifested externally. In medicine, there are four main categories within psychodermatology.

1) Psychophysiological disorders; 2) Primary psychiatric disorders; 3) Secondary psychiatric disorders and 4) miscellaneous conditions like neuroses.

Psychophysiologic disorders include skin disorders such as eczema and acne, that are triggered or worsened by emotional stress. This is the category you are most likely to encounter in the treatment room.
Primary psychiatric disorders refer to problems that arise in the mind, but result on the skin. For example, a habit frequently seen in clients is skin picking, where the picking makes the acne lesion worse, causing even more distress. But the picking, scratching or pulling (as in the hairpulling disorder, trichotillomania) is anxiety-driven, and is ultimately a compulsive behavior that is ideally corrected with psychiatric intervention.
Secondary psychiatric disorders are diseases of the skin that cause so much distress, they can trigger a significant psychological problems such as clinical depression and anxiety. The very visible skin disorders, such as psoriasis and vitiligo are particularly stressful for an individual, and rates of depression and anxiety are higher among them. Despite being ‘skin diseases,’ psychiatric intervention with anti-anxiety or anti-depressant medications may be prescribed in a medical setting.
Finally, there are miscellaneous conditions that include neuroses, suchas feeling ‘bugs’ crawling on the skin. These are primarily treated in a psychiatric setting.

These subcategories are not mutually exclusive. For example, stress can trigger a breakout but acne can also cause social anxiety and depression due to visible scarring. While the medical world is beginning to integrate these two fields to better treat their patients, this is still a relatively new field, leaving many without the option for integrative treatment. Perhaps more importantly, they may not be getting adequate solutions from their healthcare providers, with specific medicine prescribed to treat their symptoms, rather than unveil the root cause, which may very well come from the mind. Now think of your typical client. A skin treatment center will likely see clients with inflammatory skin diseases like acne, eczema, and rosacea. Even the destination spa will see overworked, stressed individuals wanting a respite from their daytoday. In all cases from stress to acne to eczema you’re dealing with chronic inflammation, and this poses a major threat to the health and wellbeing of your clients. Now think of the many people that quietly suffer from these conditions the overworked mother will likely get a facial or massage to deal with her stress levels rather than see a physician. The teenage acne client may use OTC products, but finds they are not ‘working.’ We live in a world where stress is pervasive in society, lurking behind every traffic jam and argument as fuel to the fire of inflammation in our bodies. Estheticians are uniquely qualified to provide relief from the symptoms associated with stressrelated skin diseases. From the aromatherapy inhalation techniques, to pressure point massage addons, to the act of gently massaging the face -- these are truly mind-body strategies that ultimately reduce the levels of stress hormones in the body, allowing for better balance between the immune, nervous and cutaneous systems.

The Power of Touch

Today’s society is correctly described as touch-deprived. Estheticians and massage therapists represent two professions where practitioners can touch the skin of clients -- a rarity in this day and age. With touch, we induce hormonal signals carried via the skin to our brain’s cognitive and emotional centers, resulting in positive behavioral changes. Recent neuroscientific research has unveiled the mysteries of touch. Our skin, the largest organ, is highly innervated and connected to our brain. Our skin allows us to ‘feel,’ with some sensations calling for immediate response (like a burn) while others take some time to process, like the pleasure during a massage. The rate at which these different sensations reach our brain and create emotions arises from anatomical differences in the nerve fibers that live just beneath the surface of the skin. There are fast-conducting fibers that are thick and highly insulated, that transmit electrical signals to our brain (ouch! or that burns!) much like a high-speed internet connection allows you to download a movie quickly. Now if these fast conducting nerves are like ethernet cords, the slow-acting nerves are more like having a dial-up internet connection (remember those?). These slowconducing nerve fibers are called “C-fibers” and are thin and uninsulated. And it is these very ‘slow’ nerves that are processed in the region of the human brain responsible for positive feelings, the insular cortex. To us, that means we feel pleasure from receiving a gentle caress.

When you give a facial massage, you are activating these very slow nerve fibers that result in positive feelings and ultimately reduce levels of the stress hormone, cortisol. One other mechanism by which your gentle touch reduces cortisol is by increasing it’s counterpart, oxytocin. Oxytocin, initially studied for its role in childbirth, is involved in a variety of social behaviors, including motherly care, aggression, bonding between couples, sexual behavior, social memory and trust. Oxytocin also reduces stress responses, including cortisol levels. Finally, it is hormone that’s linked to feelings of empathy.

In Your Hands

Empathy is something that is impaired in many aspects of today’s modern culture. As estheticians, you are in the business of ‘touch.’ If you were not empathic with your touch, you would likely choose a different profession. This should all make your work a little clearer you are not simply breaking up knots in muscles, or cleaning and smoothing the skin you are providing a mind-body therapy that restores the cellular balance between the skin, nervous system and immune system. One treatment at a time, through touch you can help create a more connected and compassionate world, beyond the immediate effects of reducing individual stress.

Selected Peer-Reviewed Publications

Steinhoff, M., Aguirre, C., et al. (2025). “Breaking the Itch-Scratch Cycle: An Integrative Approach for Atopic Dermatitis.” Dermatitis.
Yosipovitch, G., Aguirre, C., et al. (2024). “Integrative Treatment Approaches with Mind-Body Therapies in the Management of Atopic Dermatitis.” Journal of Clinical medicine.
Ferreira, B.R., Aguirre, C., et al. (2023). "The skin-brain connection and pleasant touch as supportive care for psychocutaneous disorders." Skin Health and Disease.
Aguirre, C. (2016). “Sleep deprivation: a mind-body approach.” Current Opinion in Pulmonary Medicine.

Full publication list

View all publication on research gate → 517 citations
Google Scholar profile

FAQs

The brain-skin connection refers to the bidirectional communication between the central nervous system and the skin. Because the brain and skin share a common embryological origin — both develop from the ectoderm — they remain intimately linked throughout life. Stress hormones, neuropeptides, and immune signals travel between the brain and skin continuously, meaning that psychological states like stress, anxiety, and depression can directly trigger or worsen skin conditions, and vice versa.
Psychodermatology is a medical subspecialty at the intersection of psychiatry and dermatology. It addresses the reciprocal relationship between the mind and skin, recognizing that psychological states can cause or worsen skin diseases, and that skin conditions can in turn trigger significant mental health consequences. There are four main categories: psychophysiological disorders (e.g. acne, eczema worsened by stress), primary psychiatric disorders (e.g. skin picking, trichotillomania), secondary psychiatric disorders (e.g. depression caused by psoriasis), and miscellaneous neuroses.
Stress triggers the release of cortisol and other stress hormones that directly impact skin function. Approximately 50% of people with acne report an emotional trigger to their breakouts, at least 80% of those with eczema say psychological stress aggravates their itch, and around 90% of those with rosacea report stress triggers a flare-up. Stress also suppresses immune function and promotes chronic inflammation, which underlies most major skin conditions.
Touch activates specialized slow-conducting nerve fibers called C-tactile (CT) fibers, which carry signals to the insular cortex — the brain region associated with positive feelings and social bonding. Gentle touch reduces cortisol levels and stimulates the release of oxytocin, a hormone linked to trust, bonding, and stress reduction. This is the neurological basis for why touch-based therapies have measurable effects on both mental and skin health.
Neurocutaneous science is the study of the interactions between the nervous system and the skin. It encompasses the neurobiology of touch, the role of neuropeptides and stress hormones in skin conditions, and the relationship between psychiatric health and dermatological disease. It forms the scientific foundation of psychodermatology and informs approaches to skin health that address both the brain and the skin simultaneously.
Neuroaesthetics is the scientific study of how the brain perceives and responds to beauty, sensory experience, and aesthetic stimuli. It explores why certain textures, colors, scents, and touches feel pleasurable or aversive — and what happens in the brain when we experience them. In the context of skin and beauty, neuroaesthetics informs how products, treatments, and environments can be designed to activate positive neurological responses, reduce stress, and enhance wellbeing at a biological level.
Dr. Claudia Aguirre is a PhD neuroscientist from the University of Southern California, specializing in the brain-skin connection, psychodermatology, and neurocutaneous science. In 2009, she became the first PhD neuroscientist to work in the professional beauty industry. She is a TEDxUCLA speaker whose talk "The Hidden Brain in Your Skin" has been viewed by millions worldwide, a published researcher cited in peer-reviewed journals, and an invited lecturer at Stanford University. She is currently developing a book on the brain-skin connection for a general audience.