Dermatitis Herpetiformis

What is Dermatitis Herpetiformis?

Dermatitis herpetiformis is a chronic autoimmune blistering skin disease with an extremely itchy rash that mostly affects the outer surfaces of the limbs.^[1] It is the skin form of celiac disease, and both conditions are triggered by gluten, a protein in wheat, barley and rye.^{[2, 3]} It needs medical diagnosis and treatment.

Common symptoms

The main symptom is intense itching and burning, with a symmetrical rash on the elbows, knees and buttocks.^[3] The tiny blisters are often not visible because scratching destroys them, leaving crusts and marks.^[1] The back, scalp, shoulders and other areas can also be affected.^[2]

Many people have no obvious digestive symptoms, yet most have intestinal changes typical of celiac disease when the bowel is examined.^[3]

Causes and risk factors

Dermatitis herpetiformis occurs in people who are sensitive to gluten and carry the same genetic markers (HLA-DQ2 or DQ8) as people with celiac disease.^[2] In both conditions the immune system makes IgA antibodies against transglutaminase enzymes. In the skin, these antibodies are deposited just under the surface layer.^{[1, 3]}

It affects mostly adults, slightly more men than women, with an average age at onset of about 50.^[3] Gluten can be hidden in processed foods and, through cross-contamination, in products you would not expect.^[4]

How it is diagnosed and treated conventionally

The diagnosis is confirmed by a skin biopsy taken next to a lesion, which shows granular IgA deposits in the upper skin layer on a special test called direct immunofluorescence.^{[2, 3]} Blood tests for celiac antibodies and, often, an assessment of the small bowel are also used.^[2]

The treatment of choice is a strict, lifelong gluten-free diet. Most people also need dapsone at the start to control the rash and itch quickly, and dapsone can usually be stopped after about two years while the diet continues.^[3] Topical clobetasol ointment may also be used.^[2] Dapsone is an antibiotic approved for this condition and requires monitoring by your physician.^[5] With good dietary adherence, the long-term outlook is excellent.^[3]

Why Dermatitis Herpetiformis calls for a whole-person approach

Dermatitis herpetiformis is more than a skin problem. The rash, the gut and the immune system are connected through gluten, and the itch can disturb sleep and mood.

Strict diet and medicine are the core of care, so other measures focus on how living with the condition feels. Supportive therapy does not change the underlying immune reaction.

Gluten and the gut

The same gluten reaction that causes the rash injures the small bowel in most patients, even without digestive symptoms.^[3] This is why the diet is the central treatment.^[3]

Itch and scratching

Intense itch is almost the rule in this disease.^[2] Itch interferes with sleep and daily life, and scratching damages the skin.^[1]

Medication monitoring

Many people take dapsone for months or years, and it needs medical supervision.^{[3, 5]} Any new supplement or herb should be reviewed against it.

Acupuncture as supportive care in Dermatitis Herpetiformis

What the research shows

No clinical trials of acupuncture for dermatitis herpetiformis were found. The only direct report is a single case report of a woman with undiagnosed dermatitis herpetiformis who had hives and eczema and received acupuncture while also using steroids and later a gluten-free diet; her symptoms improved, but a case report cannot show that acupuncture was the cause.^[6]

For itch in general, a 2015 systematic review of 24 studies of acupuncture in skin disease, which included one on dermatitis herpetiformis, found statistically significant improvement in 17 of the 24, including for pruritus, though the studies varied in design.^[7] A 2021 update found improvement in itch, atopic dermatitis, urticaria and uremic pruritus, and the update called for larger sham-controlled trials.^[8] A review of complementary therapies for itch in kidney disease found acupuncture, acupressure and topical capsaicin had the most supporting trials, with larger and better trials still needed.^[9]

These results come from other skin conditions. They do not show that acupuncture relieves the itch of dermatitis herpetiformis.

How acupuncture may work

Researchers propose that acupuncture may influence nerve reflexes and immune signaling.^[10] These are proposed explanations drawn mostly from laboratory research, and they have not been tested in dermatitis herpetiformis.

What treatment involves

Treatment uses fine, sterile, single-use needles, usually left in place for about 20 to 40 minutes, with a short course of visits and a reassessment. Needles are not placed through blistered, broken or infected skin.

Serious problems from acupuncture are rare. In prospective studies, about 9 in 100 patients had a minor reaction such as brief soreness, bleeding or bruising at a needle site, and serious events occurred in about 1 in 10,000 patients.^[11] Tell the practitioner first if you have a bleeding disorder, take blood thinners, are pregnant, or have a pacemaker (relevant to electroacupuncture).

Ayurvedic medicine as supportive care in Dermatitis Herpetiformis

The Ayurvedic view

Ayurveda has no exact counterpart to dermatitis herpetiformis. Blistering, itchy skin eruptions are traditionally grouped with the skin disorders called Kushtha or Visarpa and linked to excess Pitta, with impaired digestion (agni) as a contributing factor. This is a traditional framework, not a biomedical diagnosis.

Therapies that may be used

Care here is limited to gentle measures chosen for the individual:

• Regular meals and sleep, with all foods and products checked to be strictly gluten-free
• Calming daily routines such as breathing exercises and gentle movement
• Cooling, non-irritating skin care, avoiding oils or pastes on open or blistered areas
• Individually prescribed herbs, only after review of your medicines and the cautions below

Many traditional Ayurvedic diets and preparations are built on wheat, barley or other gluten-containing grains, and each product needs to be checked, since gluten cross-contamination is common.^[4] Panchakarma, the traditional cleansing program, is not appropriate during pregnancy, acute illness or frailty, and we would not offer it as a treatment for this condition.

What the research shows

No clinical trials or systematic reviews of Ayurvedic treatment for dermatitis herpetiformis were found in PubMed. There is no evidence that Ayurvedic therapy affects the immune reaction behind the disease or the rash.

The main concern is product quality: about one fifth of Ayurvedic medicines bought online in one study contained detectable lead, mercury or arsenic.^[12]

Herbal medicine as supportive care in Dermatitis Herpetiformis

Herbs and formulas that have been studied

No clinical trials of herbal medicine for dermatitis herpetiformis were found. The closest research covers Chinese herbal formulas for chronic itch of many causes, and these formulas are individualized, so a study of one set of patients does not apply to another.

What the research shows

A meta-analysis of 24 randomized trials found that Chinese herbal medicine, alone or with conventional treatment, reduced itch scores and improved quality of life compared with conventional treatment in chronic pruritus, mostly on low to moderate quality evidence. The authors noted that few high-quality studies exist and that better trials are needed.^[13] Chronic itch in that review came from a range of causes, and dermatitis herpetiformis was not singled out. No herb has been shown to treat the underlying disease.

Safety and herb-drug interactions

Herbs are active substances and can interact with medicines, including some used for skin and immune conditions.^[14] Tell us about dapsone, any other medicine and any supplement you take, and have herbs reviewed before use.

Herbal and dietary supplements are a recognized cause of liver injury.^[15] Product quality is also a concern, and gluten cross-contamination is common in many products, so labels need checking.^[4] Tell us if you are pregnant or breastfeeding, or have liver or kidney disease.

Translating traditional medicine into modern biological language

The comparisons here are interpretation, not equivalence. Chinese medicine would describe an itchy blistering rash using patterns such as damp-heat or blood heat. Ayurveda would speak of Pitta imbalance and weak digestion. Neither maps onto an IgA-mediated autoimmune reaction to gluten.

Researchers studying acupuncture look at nerve reflexes and immune signaling as possible ways it might affect itch and inflammation.^[10] Whether any of this applies to dermatitis herpetiformis has not been tested.

How this care fits with your medical care

Dermatitis herpetiformis needs medical diagnosis and treatment, and the gluten-free diet is the foundation of care.^[3] For a condition like this, we ask that you are under a physician's care for it and that your treating team knows you are receiving complementary care.

Do not stop or change dapsone or any prescribed medicine, and do not relax your gluten-free diet, without your physician. We do not diagnose or manage the disease or its celiac component, or replace your dermatologist, gastroenterologist or dietitian.

Please bring your diagnosis and biopsy or celiac blood test results, a full list of medicines and supplements, and details of your diet.

When to seek urgent medical care

New symptoms on dapsone or signs of a complication need prompt medical assessment, and some need emergency care.

• Blue or gray lips or skin, shortness of breath, or a racing heart while taking dapsone
• Yellow skin or eyes, dark urine or unusual fatigue and paleness
• Fever, spreading redness, pus or pain in the skin, suggesting infection
• Widespread blistering, mouth sores or a rash with fever
• Persistent diarrhea, weight loss or severe abdominal pain
• Swelling of the face or lips, or difficulty breathing or swallowing

If any of these occur, call 911 or go to the nearest emergency department.