by David Heron, DACM, L.Ac
Many people notice that their health changes with the seasons, and this is also true of skin health. A dry rash appears every winter. Itching flares in the spring. Redness or scaling returns each year as the weather shifts. Because these changes often occur during what we commonly call “allergy season,” patients frequently assume that they must be experiencing a seasonal allergy affecting the skin.
While true allergic skin reactions certainly exist, many seasonal skin flares are not considered to be allergic in the same way that hay fever is. Instead, they often reflect the body’s response to broader environmental changes such as temperature, humidity, sunlight, and daily habits, all of which place new demands on an already vulnerable system.
Classical Chinese medical texts described health as a dynamic process shaped by seasonal change. In the Huang Di Nei Jing Su Wen, one of the foundational texts of Chinese medicine, the capacity to remain healthy is closely tied to the body’s ability to adapt to ongoing changes in nature. As the Su Wen states, “The four seasons are the basis of growth and decline,” and “those who oppose the seasons will suffer illness.” These statements reflect an early observation that human physiology is inseparable from the rhythms of the natural world.
Paul Unschuld, in his translations and interpretive work on the Nei Jing, has emphasized that seasonal change functions as a primary explanatory framework in early Chinese medicine, shaping how symptoms arise, transform, and resolve. In this view, illness emerges not from a single external cause, but from a failure or inability to adjust, internally or behaviorally, to changing environmental conditions.
This perspective offers a useful lens through which to understand why so many people experience seasonal changes in their skin. To better understand these seasonal skin changes, it is helpful to first clarify what an allergy is, and what it is not.
What Is a “True Allergic Condition”?
In modern medicine, the term allergy has a specific meaning. A true allergic condition occurs when the immune system becomes sensitized to a particular substance, such as pollen, food, or medication, and reacts in a predictable way upon exposure.
Most classic allergies are mediated by an immune antibody called IgE. When a sensitized individual encounters the relevant allergen, IgE triggers mast cells to release histamine and other inflammatory mediators, leading to rapid and recognizable symptoms.
True allergic conditions share several defining features:
- A specific trigger
- Reproducible symptoms with exposure
- Improvement with avoidance
- Often supportive findings on allergy testing
Symptoms of hay fever, also known as allergic rhinitis, are the clearest example. Tree pollens in spring, grasses in early summer, and weeds such as ragweed in late summer and fall trigger predictable symptoms such as sneezing, itchy eyes, nasal congestion, and postnasal drainage in sensitized individuals. The timing is consistent, the trigger is identifiable, and the mechanism is clearly allergic.
Because hay fever is so familiar, it often becomes the model through which all seasonal symptoms are interpreted. However, many skin conditions behave differently.
While this article focuses primarily on skin conditions, it is worth noting that Chinese medicine also has a long history of treating hay fever and other allergic respiratory conditions.
Seasonal Change and the Body: A Broader View
Seasonal transitions bring predictable environmental shifts:
- Colder or warmer temperatures
- Changes in humidity
- Variations in sun exposure
- Increased wind, indoor heating or air conditioning
Each of these influences affects the skin’s barrier function, hydration, and immune signaling. Even without allergies, the skin may become more reactive simply because it is under greater physiological stress. During winter, for example, cold and dry air often leads to a loss of skin lipids, resulting in dryness and partial disruption of the skin barrier. In many people this presents as simple dry skin, but in others, particularly those with pre-existing barrier vulnerability, it can contribute to inflammation and irritation.
In Su Wen Chapter 3, the relationship between the body and its environment is described as a form of communication. “When vital Qi communicates freely with Heaven, the body remains intact,” the text explains, while disruption of this communication gives rise to disease. In Unschuld’s interpretation, “Heaven” refers not to a metaphysical force, but to climate, time, and environmental order.
From this standpoint, seasonal symptoms reflect a mismatch between internal state and external conditions rather than a misdirected immune attack against a specific substance.
In my clinical practice, I find that among patients who experience skin flare-ups around seasonal transitions, several conditions appear repeatedly: atopic eczema, urticaria, perioral and periorbital dermatitis, and seborrheic dermatitis. Let us look at how the seasons influence each of these conditions and what Chinese medicine has to offer.
Atopic Eczema: Allergic Triggers, Non-Allergic Disease
Atopic eczema, also known as Si Wan Feng 四彎風 (“Wind of the Four Crooks”), is often the first condition patients associate with skin allergy, and for understandable reasons. Many individuals with eczema also have asthma, hay fever, or positive allergy tests. Atopic eczema is considered part of the “atopic march,” in which individuals develop a sequence of allergy-associated conditions over time.
However, eczema is fundamentally a disorder of skin barrier dysfunction combined with immune dysregulation. An allergy may act as a trigger in some atopic eczema patients, but it does not create the condition itself. Many people with eczema have no identifiable allergic sensitization and still experience dermatitis and predictable seasonal flares, particularly during cold, dry months.
From both a modern dermatologic and classical perspective, eczema illustrates how seasonal stress can amplify an existing vulnerability rather than the introduction of a new disease.
In my clinical practice, I see atopic eczema patients presenting with a wide range of seasonal responses, from very mild to quite severe. On the milder, non–allergy-driven end of the spectrum, many patients notice only a slight winter exacerbation. Some individuals with very mild eczema experience lesions only during dry winter months, and even then, the symptoms are often limited.
On the other end of the spectrum, spring and fall can bring more pronounced flares due to allergic triggers. Some atopic eczema patients with hay fever report severe ocular and nasal symptoms, such as waking with their eyes significantly swollen, itchy, crusted with dried discharge, and accompanied by nasal congestion. Other patients with specific pollen sensitivities may experience little or no respiratory symptoms yet reliably develop eczematous skin flares at the same time each year.
In Chinese medicine, atopic eczema (Si Wan Feng) is understood as involving multiple pathological factors, including Wind, Dampness, Heat, and, in some cases, underlying deficiencies. Treatment focuses on addressing these factors while helping the body regulate itself more effectively.
For patients with very mild, winter-only eczema, dryness is often the primary aggravating factor. In such cases, a moisturizing yet heat-clearing topical ointment made with herbs such as Zi cao 紫草 / Arnebiae lithospermum root may help resolve mild lesions. Even then, I often recommend a short course, roughly two weeks, of an internal herbal formula to address dryness and any accompanying imbalances more thoroughly.
Most cases, however, require a more complete course of treatment to restore balance. In patients whose eczema is aggravated by hay fever and accompanied by significant rhinitis, herbs that address Wind lodged in the Lung or nasal orifices, such as Cang er zi 蒼耳子 / Xanthium sibiricum fruit and Xin yi hua 辛荑花 / Magnolia denudata flower may be added.
For patients with clear seasonal pollen sensitivity who present primarily with eczema flares, treatment is guided by presentation. Large, erythematous, itchy, scaling areas are often treated as Blood Heat with Wind, using herbs such as Sheng di huang 地黃(生) / Rehmannia glutinosa root，Mu dan pi 牡丹皮 / Paeonia suffruticosa root- bark, Fang feng 防風 / Saposhnikovia divaricata root, and Jin yin hua 金銀花 / Lonicera japonica flower. Hive-like reactions are approached by venting and releasing the exterior with herbs such as Fu ping 浮萍 / Spirodela polyrrhiza herb. These are just a few possibilities for many pattern presentations. For these patients, I encourage completing a full course of treatment rather than stopping as soon as symptoms resolve, and to return for preventive care several weeks before the expected flare the following year. Even during symptom-free periods, continued topical care is often advised.
Outside of true or partial allergy-driven flare-ups, it is often the interaction between seasonal change and daily habits that determines whether a stable condition remains quiet or flares. For example, consider a patient I treated for Si Wan Feng (atopic eczema). She had a long history of severe eczema that had not been fully cleared by biologic therapy. After discontinuing biologics, she began treatment with Chinese herbal medicine in combination with dietary guidance and remained clear for an extended period.
An important component of her initial treatment involved reducing internal warming influences, particularly the regular consumption of very spicy foods. She was advised to avoid chili peppers and other strongly acrid foods, which appeared to aggravate her skin. After her eczema had been stable for some time, we discontinued treatment and, over time, she gradually returned to eating spicy foods on a regular basis.
Following an extended period of clear skin, she returned during a seasonal transition in the fall, which is a time of year in this region characterized by warm, dry, and often windy conditions. As these warm, dry winds set in, she began to experience a flare marked by dryness and increasing erythema. On examination, the eruption was limited primarily to the upper body, including the elbow flexures, face, and neck. In Chinese medical terms, this presentation was consistent with a recurrence of Si Wan Feng in the pattern of Blood Heat with Wind.
Further inquiry revealed that she had resumed eating spicy foods frequently, and she herself noted a clear pattern: after meals heavy in chili peppers and other strongly warming foods, her skin would become noticeably redder and more inflamed the following day. From a Chinese medical perspective, this case illustrates a disharmony between internal habits and external conditions. Internally generated Heat from diet appeared to combine with the warm, dry winds of the season, aggravating underlying Blood Heat and giving rise to Wind that manifested at the skin. Together, these factors recreated a pattern that had previously been resolved, underscoring how lifestyle and environment can converge to reactivate dormant disease tendencies.
Urticaria (Hives): Sometimes Allergic, Often Not
Urticaria occupies a unique position in discussions of allergies. In acute cases triggered by foods, medications, or insect stings, hives clearly represent a true allergic reaction.
Yet most chronic urticaria is not allergic, and the majority of urticaria patients seeking care in my clinic do not have allergic urticaria. Physical urticarias triggered by cold, heat, or pressure often show strong seasonal patterns, but they arise from mast cell activation rather than immune sensitization. Here again, the season acts as a provoking condition, not a true allergen.
In my clinic, I most commonly see urticaria triggered by temperature extremes, particularly heat, though cold-triggered urticaria also occurs. Among Heat-related cases, I most often encounter the Hot Blood Generating Wind pattern rather than classic Wind Heat presentations.
Wind Heat urticaria tends to present acutely, often affecting the upper body, with larger red wheals. This pattern can be allergy-driven and is typically short-lived, lasting up to four to six weeks. With timely Chinese medicine treatment, both the severity and duration of symptoms can often be reduced. Herbal strategies focus on venting and releasing the exterior, using herbs such as Jing jie 荊芥 / Schizonepeta tenuifolia spike, Fang feng 防風 / Saposhnikovia divaricata root, and Fu ping 浮萍 / Spirodela polyrrhiza herb, while also resolving toxins with herbs like Jin yin hua 金銀花 / Lonicera japonica flower and Lian qiao 連翹 / Forsythia suspensa fruit.
Hot Blood Generating Wind urticaria, by contrast, is typically chronic, lasting longer than six weeks and more commonly prompting patients to seek care. These patients often report very small, intensely itchy, transient red hives that are not limited to the upper body. Dermographism, the appearance of hives in areas subjected to pressure or friction, is also particularly common in this pattern. These patients often report developing urticaria around the bands of their tight-fitting athletic gear.
This pattern, Hot Blood Generating Wind, is often, though not always, associated with emotional stress, chronic overwork, or long-standing internal Heat. External heat, exercise, or warm environments can clearly provoke symptoms. Treatment focuses on cooling and clearing Blood Heat, venting Wind, regulating Qi, and clearing Heart Heat, using herbs such as Sheng di huang 地黃(生) / Rehmannia glutinosa root, Chi shao 赤芍 / Paeonia lactiflora root (red), Dan zhu ye 淡竹葉 / Lophatherum gracile herb, and Huang lian 黃連 / Coptis chinensis rhizome. Guidance around stress management and emotional regulation is often an important adjunct to treatment.
As might be expected, Hot Blood Generating Wind urticaria presents more often in my clinic during the summer. Patients often report that they had suffered the lesions for some time, but the tipping point for which they sought treatment is often after a few days of unseasonably warm weather or a trip to a warm location where the regular appearance of hives and itch drove them mad. However, while the warm weather is seen as the clear aggravator, oftentimes it was prolonged emotional dysregulation that led to this inability to harmonize with the outside world.
Perioral and Periorbital Dermatitis: Hypersensitivity Without True Allergy
Perioral and periorbital dermatitis are frequently mistaken for allergic reactions, particularly when they appear or worsen at certain times of year.
Seasonal changes often alter skincare behavior. Heavier moisturizers in winter and increased sunscreen or cosmetic use in summer can overwhelm sensitive facial skin, leading to inflammation that appears seasonal but is not allergic in mechanism.
Perioral dermatitis was only formally described in modern medicine in the mid-twentieth century and does not appear as a clearly delineated condition in classical Chinese texts. From a modern medical perspective, perioral and periorbital dermatitis are more closely linked to barrier disruption and topical exposure than to allergy. From a Chinese medical perspective, internal disharmonies are understood to predispose the skin around the mouth and eyes to hypersensitivity and inflammation. Topical corticosteroids are well known to aggravate and perpetuate this condition.
In my practice, many patients presenting with perioral or periorbital dermatitis believe they have an allergy, whether environmental, product-related, or both, and are often seeking clarity after multiple failed attempts at self-treatment with topical products.
Clinically, perioral dermatitis presents as erythematous, sometimes scaling skin, with or without small micropustules that are frequently mistaken for acne. The condition is far more prevalent in women than men. A common scenario involves the sudden appearance of “dry skin” around the mouth, and sometimes around the eyes, prompting the use of various creams or ointments. Over time, redness increases around the nasolabial folds and mouth, and micropustules may develop.
This progression can be confusing and frustrating for patients who may wonder whether an initial seasonal change caused dryness and whether subsequent worsening reflects an allergy or a reaction to the products they applied. This uncertainty often increases stress, which can further aggravate symptoms. In reality, this pattern reflects the development of perioral or periorbital dermatitis rather than an allergic reaction.
Chinese medicine treats this condition effectively by simplifying topical routines and addressing internal patterns involving excess Heat or Fire in the Lungs, Spleen, and or Stomach; Stagnant Liver Qi and Liver Blood Stasis; and / or Damp Heat and Toxin in the Spleen and Stomach. Internal herbal formulas may be combined with carefully selected topical medicinal ointments to reduce dryness and erythema and support recovery.
Seborrheic Dermatitis: Seasonal Flares, Non-Allergic Pattern
Seborrheic dermatitis commonly worsens in fall and winter and improves in summer. This seasonal pattern reflects changes in sunlight exposure, skin surface lipids, and microbial balance rather than allergic sensitization.
Its seasonality reinforces the broader theme of this article. Even when symptoms follow a predictable yearly pattern, they are not necessarily allergic in nature. The underlying disharmonies leading to these seasonal changes can and should be corrected in seborrheic dermatitis, as well as in the other conditions discussed above.
Seborrheic dermatitis has been described under various names throughout the history of Chinese medicine, including White Scales Wind and Face Wandering Wind.
White Scales Wind 白屑風 (Bái Xiè Fēng) refers to significant dandruff and greasy scaling of the scalp that may extend beyond the hairline. Face Wandering Wind 面游風 (Miàn Yóu Fēng) describes erythema, dryness, and scaling affecting sebaceous-rich areas of the face, such as the eyebrows, nasolabial folds, and sides of the nose.
These conditions are typically attributed to patterns involving Heat, Damp Heat, Wind, and Dryness in varying proportions. The dryness of late fall and winter often aggravates symptoms, not due to allergy, but because cold constrains the free flow of sebum and dry environmental conditions compromise the skin surface.
Proper and thorough treatment of the internal disharmonies underlying seborrheic dermatitis can resolve or significantly reduce symptoms once they have started or prevent and reduce symptomology if treated effectively before the season. Through a combination of internal herbal formulas, dietary guidance, and topical herbal ointments or shampoos, Chinese medicine can be used to treat seborrheic dermatitis.
Skin “Allergies,” Seasonal Change, and the Search for Balance
Our inner nature is as dynamic as the outer nature of the earth. Optimal health is achieved when the internal state remains in harmony with the external environment. For those who experience skin conditions that worsen with seasonal change, this often reflects either difficulty adapting to shifts in the outer world or the seasonal aggravation of pre-existing internal disharmonies.
Many people seek care believing they have seasonal skin allergies, and in some cases they do. More often, however, they are having difficulty maintaining healthy skin barrier function or appropriate immune reactivity in response to seasonal environmental change. They are producing symptoms that resemble allergies without meeting its criteria.
From both a modern medical and Chinese medical perspective, the skin is highly responsive to environmental conditions. Changes in temperature, humidity, sunlight, and daily habits place new demands on the skin, particularly in individuals with underlying barrier vulnerability or immune dysregulation. These influences can lead to predictable seasonal patterns of inflammation that are easily mistaken for allergic disease.
Classical Chinese medical texts framed health as the ability to remain aligned with seasonal change, and that illness was the result of failing to adapt. Modern dermatology, though expressed in different language, reaches a similar conclusion about the skin. Barrier integrity, immune balance, and environmental context often matter as much as, and sometimes more than, specific allergens. Chinese medicine has long emphasized that lifestyle habits can either support internal harmony and alignment with the natural world or can contribute to systemic disharmony.
Recognizing the distinction between true allergic disease and seasonal skin reactivity allows both patients and practitioners to approach treatment with greater clarity and precision. Rather than focusing exclusively on allergen avoidance, care can be directed toward restoring internal balance, supporting skin resilience, and anticipating seasonal challenges before they arise.
Viewing seasonal skin flares through this broader lens ultimately leads to more effective, individualized, and sustainable care.
References
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