Health condition
Recurrent erythema multiforme
Erythema multiforme causes crops of distinctive target-shaped lesions on the hands and limbs; when it recurs repeatedly, the usual driver is herpes simplex virus, and continuous antiviral suppression is the evidence-based treatment.
Why trust this guide
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Editorial team
Written by our editorial team from the UK sources listed on each page.
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Sourced from guidance
Checked against current NHS and UK specialist society guidance at the time of review.
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Current for 2026
Reviewed on 2026-09-27 with the next review scheduled for 2027-09-27.
Key facts
The essentials at a glance.
The symptoms to recognise, when to seek help, which specialist to see, and what treatment usually involves.
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Classic "target" lesions - three concentric zones with a dusky centre - concentrated on hands, feet and extensor limbs
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Herpes simplex (often a barely noticed cold sore 1-2 weeks earlier) triggers the great majority of recurrent cases; Mycoplasma is another cause
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Mucosal involvement (mouth, eyes, genitals) defines erythema multiforme major and needs prompt treatment
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Six months or more of continuous aciclovir (or valaciclovir) suppression is first-line for six or more episodes a year or disabling recurrences
Understanding the condition
What it is and what happens next.
What causes it, how it is diagnosed, and the treatment routes available in the UK.
What it is and how it feels
Each episode is an immune reaction to viral antigen deposited in the skin rather than an infection of the skin itself, which is why antivirals taken once the rash appears achieve little. Attacks last two to four weeks and, in recurrent disease, can cycle many times a year, with painful mouth erosions in the major form making eating and speaking difficult.
Diagnosis and treatment routes
Assessment confirms the clinical pattern, looks for the herpes association (which may need asking about carefully - the triggering cold sore can be trivial or hidden), and excludes mimics such as urticaria and fixed drug eruption, with biopsy in doubtful cases. Continuous antiviral prophylaxis for at least six months markedly reduces recurrences; when attacks persist despite adequate suppression, dermatologists use options including dapsone, hydroxychloroquine, mycophenolate or azathioprine. In much of the UK, a routine NHS referral to the relevant specialist clinic can take several months, whereas an initial appointment with a private consultant is typically available within around two weeks.
Seeing a specialist
Who to see, and how quickly you can be seen.
The specialist for this condition is usually a consultant dermatologist. Your GP can refer you on the NHS, or you can arrange a private consultation directly.
A quiet reminder
This guide is for information, not medical advice.
Your GP knows your history and can tell you which parts apply to you. If in doubt, see them - and seek urgent care for any of the emergency symptoms described above.
Frequently asked
Common questions about Recurrent erythema multiforme.
Quick, plain-English answers to what people ask us most.
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What does recurrent erythema multiforme mean?
Recurrent erythema multiforme is a condition your doctor may diagnose based on your symptoms, medical history and, where needed, examination or test results. Understanding exactly how it applies to your situation is best done with a clinician who can look at your full picture rather than relying on general information alone.
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What are the risk factors for recurrent erythema multiforme?
The exact cause of recurrent erythema multiforme can involve a mix of genetic, environmental and lifestyle factors, and it isn't always possible to pin down a single trigger. A specialist assessment can help identify any modifiable risk factors relevant to you.
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What are the symptoms of recurrent erythema multiforme?
Symptoms of recurrent erythema multiforme vary from person to person and can range from mild and easily missed to significant enough to affect daily life. Because overlapping conditions can produce similar symptoms, a clinical assessment is the most reliable way to confirm what's actually going on.
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Is recurrent erythema multiforme serious or dangerous?
Most cases of recurrent erythema multiforme are manageable with appropriate care, though, like many conditions, it can occasionally lead to complications if left unassessed or untreated. Your clinician can give you a realistic sense of the risks based on your specific presentation.
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Does recurrent erythema multiforme run in families?
In most cases recurrent erythema multiforme isn't straightforwardly inherited, though family history can sometimes be a relevant background factor. A clinician can help you understand whether it's worth mentioning relatives' health when being assessed.
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Can recurrent erythema multiforme be treated or prevented?
Recurrent erythema multiforme can often be managed effectively, and in some cases prevented or reversed, with the right combination of lifestyle changes, medication or other targeted treatment. A specialist will tailor the approach to your circumstances rather than applying a one-size-fits-all plan.
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What treatment options are available for recurrent erythema multiforme?
Management of recurrent erythema multiforme is individualised, ranging from conservative measures and monitoring through to more active medical or surgical treatment depending on how it's affecting you. A clear diagnosis is the first step towards choosing the right approach.
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How long does recurrent erythema multiforme last?
The outlook for recurrent erythema multiforme varies widely depending on the underlying cause, how early it's diagnosed, and how it responds to treatment. Many people see significant improvement with appropriate care, and your specialist can give you a more personalised timeframe once they've reviewed your case.
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What else could recurrent erythema multiforme be mistaken for?
Because several conditions can share similar symptoms to recurrent erythema multiforme, clinicians often consider a short list of possibilities before confirming a diagnosis. This is one of the main reasons a proper assessment, and sometimes targeted tests, matters more than relying on symptoms alone.
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When should I see a doctor about recurrent erythema multiforme, and how quickly can I be seen privately?
It's worth seeking medical advice if symptoms of recurrent erythema multiforme are persistent, worsening, or affecting your daily life, rather than waiting for them to resolve on their own. NHS routine referrals for this kind of assessment can take anywhere from around 20 to 45+ weeks, whereas private consultants typically offer an appointment within about two weeks.