Atopic dermatitis

Understanding Atopic dermatitis

This condition is described through congenital constitution: the skin is vulnerable because the internal organs that nourish it are unsettled, and the flexural creases are where dampness tends to collect.

In the wet phase the picture is Damp-Heat or Spleen deficiency with dampness: red weeping lesions with yellow crusting, or pale oozing patches with bloating and loose stools. In the dry phase the picture is Blood deficiency with external wind, or Kidney and Liver Yin deficiency, with dry lichenified skin and itch that worsens at night.

A separate pattern, Heart Fire blazing, is described for bright red hot lesions with intense burning itch and disturbed sleep, often in children. The classical literature notes that these patterns alternate within the same person as the condition moves between wet and dry phases, which is why treatment is reviewed as the skin changes.

The practical implication is that a single fixed formula rarely stays right. The wet phase calls for clearing and draining, the dry phase for nourishing, and the classical literature treats the transition between them as part of the clinical work.

The Chinese name for the condition means wind of the four bends, and it names both the site and the mechanism. The creases inside the elbows and knees are where fluid tends to pool and where the surface is thinnest, so they are the first places to show trouble when the Spleen cannot transform fluids and the Lung cannot hold the exterior. The same diagnosis therefore produces weeping skin in one person and dry, cracked skin in another.

The constitution is where the trouble usually starts: a Spleen and Lung that were weak to begin with. The Spleen turns food into Qi and Blood and moves fluids; when it is sluggish, Dampness collects internally. The Lung holds the skin and the Wei Qi that patrols it, so when it is weak, Wind, Heat and Dampness reach the surface unopposed. Internal Dampness meeting an exposed exterior is what produces the itchy, oozing or dry lesions, and it is why treatment often works on digestion and immunity at the same time as on the skin.

Age changes the expression. Infants commonly show a bright red, heat-driven pattern with irritability and broken sleep, children often show a pale, moist, digestive pattern, and adults who have had the condition for years drift towards dryness, thickening and night itch as Blood and Yin are consumed. A single person may pass through several of these stages, or carry two at once with a damp flare on a dry background, which is why the assessment is repeated rather than made once.

How it connects

Atopic dermatitis often appears alongside asthma and allergic rhinitis. In TCM all three share a root of Lung, Spleen and Kidney deficiency with weak defensive Qi: the Lungs govern the skin and the body's outer defence, so a constitutional weakness there leaves both skin and airways exposed to Wind, Dampness and Heat. A weak Spleen adds Dampness, which surfaces as weeping eczema while also congesting the sinuses and lungs. Treating the underlying deficiencies tends to bring relief to skin and breathing together. The overlap is practical as well as theoretical. Because skin and airways are both surfaces meeting the outside world, a formula that consolidates the Wei Qi may ease nasal congestion and wheeze at the same time as the skin, and patients often notice that their hay fever season is milder when the eczema is stable. The corollary is that treatments which only suppress the skin, without attention to the Spleen and Lung deficiency behind it, tend to leave the other atopic conditions untouched.

How it is assessed

Diagnosis looks at the phase of the skin, the location, and the constitution behind it.

What a practitioner looks for

• Phase: wet and weeping points to Damp-Heat or Spleen deficiency; dry and lichenified points to Blood or Yin deficiency.
• Location: flexural creases are the characteristic site named in the Chinese name for the condition.
• Constitutional signs: digestion, appetite, sleep, night sweats, low-back weakness, and how the person responded as a child.
• Tongue and pulse: a pale swollen tongue with teeth marks supports Spleen deficiency; a red tongue with a peeled coating supports Yin deficiency.

The examination begins at the skin. Colour, moisture, thickening, crusting and the exact distribution are recorded, along with the patient's account of what precedes a flare and what settles it. Because the rash alternates between wet and dry phases, the practitioner asks whether it weeps or cracks, whether heat or cold makes it worse, how sleep is affected and how the digestion behaves. These answers separate a damp picture from a dry one before the tongue is even seen.

Tongue and pulse then confirm the pattern. A red tongue under a thick, greasy yellow coat, together with a slippery, rapid pulse, belongs to Damp-Heat; a pale, swollen tongue bearing teeth marks beneath a white greasy coat, with a soft slow pulse, belongs to Spleen Deficiency with Dampness; a pale thin tongue under a thin dry coat, with a fine, slightly wiry pulse, belongs to Blood Deficiency with External Wind. In long-standing cases a red, thin, cracked tongue with little coat and a fine rapid pulse indicates Kidney and Liver Yin Deficiency, and in infants a distinctly red tip with a rapid forceful pulse indicates Heart Fire.

Age and history carry weight. Infantile eczema with irritability, broken sleep and bright red lesions is read differently from the dry, lichenified skin of an adult who has had the condition for twenty years, and a personal or family history of asthma or allergic rhinitis supports the constitutional view. The practitioner also looks for signs of secondary infection and asks about topical steroid use, so that withdrawal effects are not mistaken for a new pattern.

TCM patterns in Atopic dermatitis

Five patterns cover most atopic dermatitis, and they sit on a moving spectrum. At the wet end, Damp-Heat gives red, hot, weeping patches that crust yellow, while Spleen Deficiency with Dampness gives paler, cooler, oozing skin with bloating and loose stools; the first is driven by heat, the second by a Spleen that fails to move fluids. In the middle sits Heart Fire blazing, the infantile and stress-linked picture of bright red, burning, itchy skin with irritability. At the dry end, Blood Deficiency with External Wind gives flaky, lichenified patches with night itch, and Kidney and Liver Yin Deficiency gives deeper dryness with night sweats. The strategies pull in opposite directions: clearing and drying calms a wet flare but worsens a dry one, while nourishing and moistening rebuilds dry skin but can aggravate oozing. Most people need a sequence, with clearing first and building later.

Treatment approach

How the tradition treats atopic dermatitis, with the herbs, formulas and points used for it.

Principles

• Treat the phase: clear and drain in the wet phase, nourish and moisten in the dry phase.
• Support the Spleen throughout, since constitution and digestion are described as the root of the tendency.
• Calm Heart Fire where the itch is burning and sleep is disturbed.
• Protect the barrier: the classical literature treats emollients as part of care, not as an alternative to it.
• Timing shapes the prescription as much as the pattern does: clearing herbs are used while the skin is wet and reduced as it dries, and nourishing herbs are introduced once oozing has stopped. A single formula is rarely continued unchanged for months, and the practitioner reviews the skin together with sleep, digestion and the pulse before each adjustment, so that clearing does not drift into dryness and tonifying does not entrench Dampness.

Herbs used

Formulas

• Dang Gui Yin Zi
• Si Miao San
• Ling Gui Zhu Gan Tang
• Dao Chi San
• Liu Wei Di Huang Wan

Acupoints

• SP-6 (Sanyinjiao)
• SP-10 (Xuehai)
• LI-11 (Quchi)
• SP-9 (Yinlingquan)
• ST-36 (Zusanli)
• HT-7 (Shenmen)
• HT-8 (Shaofu)
• KI-3 (Taixi)
• BL-18 (Ganshu)
• BL-23 (Shenshu)

What to expect

• Itch is described as easing within the first one to two weeks of herbal treatment.
• Visible skin change follows more slowly, over weeks to months.
• The condition is expected to need ongoing management rather than a single course.
• Progress is judged by sleep and itch before appearance, because the need to scratch usually settles first and the skin follows. Flares around weather changes, stress or dietary slips are expected during treatment, and the plan is adjusted rather than abandoned. Between flares a lighter preventive formula is often continued for a season to consolidate the result, especially where the tendency has been lifelong.

Safety and when to get help

For anything severe, sudden or spreading quickly, read when a skin problem needs urgent care.

Cautions

• Do not stop prescribed topical or systemic treatment abruptly.
• Children require practitioner review and weight-appropriate dosing.
• Long-term internal herbs should be supervised with liver function checked where indicated.

Using this alongside conventional care

• TCM is described as complementary to conventional care: emollients and prescribed topical treatment continue alongside herbs and acupuncture, and any change to systemic therapy belongs with the prescribing doctor.
• The practical points are to keep emollients going, to use topical steroids as prescribed rather than stopping abruptly when herbs begin to work, and to tell the dermatologist about every herb and supplement in use. Where immunosuppressants or biologics are prescribed, the herbal formula is kept simple and supportive so that any change in the disease or in blood results can be attributed clearly. Herbal washes and compresses are a useful local addition, but they should be stopped if the skin becomes irritated or shows signs of infection.

Diet and lifestyle

• The advice is to limit greasy, fried, spicy and sweet food, alcohol and dairy where the picture is Damp-Heat, and to keep a food and symptom diary so that individual triggers are found rather than assumed.
• Dietary advice follows the same split as the treatment. While the skin is wet and hot, the emphasis is on light, drying foods such as barley, mung beans, bitter greens and lightly cooked vegetables, with dairy, sugar, fried food and alcohol reduced. Once the skin is dry, the emphasis reverses towards moistening and nourishing foods: black sesame, goji berries, yam, pear, bone broth and cooked whole grains. Warm cooked meals suit most patterns better than raw salads and iced drinks, and a simple food diary is more useful than a long list of forbidden items, because the offending food is often particular to the person.

If you're pregnant

Atopic dermatitis can flare in pregnancy as Blood and Qi shift, and the Blood deficiency with External Wind pattern often becomes more pronounced as pregnancy advances and Blood is diverted to the fetus.

Dang Gui Yin Zi, the key formula for that pattern, contains Dang Gui, which in large doses may stimulate uterine activity, so it is used cautiously and at reduced dosage under professional guidance. Acupuncture is generally safe, but points such as Sanyinjiao (SP-6) and Hegu (LI-4), sometimes used for skin, must be avoided or used with great care because they can promote labour.

Milder food-based approaches such as congee with Yi Yi Ren and Bai Bian Dou are preferred for managing Dampness in pregnancy, and cooling compresses can soothe acute itching without systemic risk.

If you're breastfeeding

The main concern in breastfeeding is that bitter-cold herbs used to clear Damp-Heat, such as Huang Bo and Ku Shen, can pass into milk and cause diarrhoea or digestive upset in the infant. For Damp-Heat a practitioner may substitute milder aromatic herbs such as Cang Zhu and Fu Ling, or lean on acupuncture and external washes.

Blood-nourishing formulas such as Dang Gui Yin Zi are generally safer during lactation because they support postpartum Blood deficiency while moistening dry itchy skin. Diluted decoctions of Ku Shen or Di Fu Zi used as compresses give local relief with minimal systemic absorption and make a valuable first line while nursing.

If treating a child

Atopic dermatitis is extremely common in infants and young children, where Spleen deficiency with Dampness, Damp-Heat and Heart Fire are the most frequent patterns. The Heart Fire pattern is especially characteristic of infants, with bright red, burning, intensely itchy lesions and marked irritability.

Diagnosis relies on observation of skin, tongue and behaviour, since children cannot describe itching or burning. Doses are reduced to about a quarter to a half of the adult dose by age and weight, formulas favour gentle Spleen-fortifying herbs such as Bai Zhu and Fu Ling while bitter-cold herbs are used sparingly and briefly, acupuncture may be replaced by paediatric tuina or acupressure, and removing Dampness-producing foods is a cornerstone of long-term management.

If treating an elderly patient

In older adults the dry, lichenified phase of atopic dermatitis predominates, driven by Blood deficiency with External Wind or Kidney and Liver Yin deficiency. The skin becomes thin, papery and deeply dry and the itching is often worst at night, when Yin is most depleted.

Treatment nourishes Blood and Yin with formulas such as Dang Gui Yin Zi or Liu Wei Di Huang Wan at lower doses to spare a weaker digestion. Polypharmacy is a real concern, so herb-drug interactions must be screened, especially with anticoagulants if Dang Gui is prescribed; oily herbal salves and gentle acupuncture with fewer needles are better tolerated than strong internal herbs, and slower, modest gains in comfort and sleep are realistic goals.

Urgent-sign guidance is based on standard sources: NHS anaphylaxis, NHS cellulitis, NHS Stevens-Johnson syndrome, NHS melanoma.

Related conditions

Conditions that often coexist with atopic dermatitis or share its patterns.

Evidence

Evidence is strongest for oral Chinese herbal medicine. Systematic reviews and randomised trials report that formulas which nourish Blood and clear Heat reduce severity and extent, improve sleep and reduce the need for topical steroids. A 2024 pilot trial of Dang Gui Yin Zi (VGH4) reported improvements in severity and quality of life over placebo. Acupuncture and acupressure also show promise for itch.

What the reviews show is a consistent direction with uneven quality. Oral herbal medicine, especially formulas that nourish Blood and clear Heat, has been associated with lower eczema severity and less reliance on topical steroids, and the 2024 VGH4 crossover pilot found improvements in SCORAD scores and quality of life against placebo with a good safety profile. Gu and colleagues reached a similar conclusion in their overview of the clinical evidence while noting that the quality of most trials was moderate. Acupuncture and acupressure have smaller, promising datasets, and because most research originates in China, replication elsewhere is limited. The most defensible reading is that TCM adds to, rather than replaces, emollients and intermittent topical treatment.

Studies often cited

PubMed records for the TCM evidence

Real PubMed records for the TCM clinical evidence discussed above, selected by condition name and title relevance. They are references, not proof of benefit.

• Acupuncture for atopic dermatitis: a systematic review and meta-analysis.. BMJ open, 2024. PMID: 39638592.
• Neutrophils in Atopic Dermatitis.. Clinical reviews in allergy & immunology, 2024. PMID: 39294505.

Classical record