What is erythema marginatum in rheumatic fever?

Erythema marginatum in rheumatic fever is relatively uncommon. It presents as transient, well-demarcated, pale pink annular or semicircular macules of varying sizes, with central pallor. These lesions typically appear on the trunk and proximal limbs, may fade and reappear intermittently (chronic or migratory course), and can persist for several weeks. They are frequently accompanied by systemic manifestations of rheumatic fever, including fever, migratory arthralgia, elevated erythrocyte sedimentation rate (ESR), and positive antistreptolysin O (ASO) titers. So, what exactly is erythema marginatum in rheumatic fever? The following section addresses this question.

What Is Erythema Marginatum in Rheumatic Fever?

Erythema marginatum is a cutaneous manifestation of rheumatic fever. It usually develops late—days to weeks—following a group A streptococcal infection. Its incidence is low, ranging from approximately 6% to 25%. Clinically, the rash appears as pale pink, annular or serpiginous macules with central pallor. Lesions may spontaneously resolve or suddenly emerge; most disappear within hours to two days after onset. Erythema marginatum tends to recur during episodes of rheumatic fever flares following streptococcal infection. It most commonly affects the trunk and flexural surfaces of the limbs, presenting as flat, non-pruritic, non-tender, slightly raised, annular or semicircular lesions. After resolution, no scaling or post-inflammatory hyperpigmentation remains. No specific pharmacologic therapy targets the rash itself; instead, penicillin is administered to eradicate residual group A streptococci.

Additional Information: Management of Erythema Marginatum in Rheumatic Fever

1. Symptomatic Treatment

Topical corticosteroid preparations or calamine lotion may be applied for symptomatic relief of erythema marginatum associated with rheumatic fever. Alternatively, adjunctive therapies—including vitamin C, antihistamines, calcium supplements, or systemic glucocorticoids combined with immunosuppressants (e.g., hydroxychloroquine)—may be considered. With effective treatment and subsequent control of underlying rheumatic activity, the rash typically resolves completely without residual scarring or pigmentary changes.

2. Antibiotic Therapy

The therapeutic principle for erythema marginatum in rheumatic fever emphasizes early diagnosis and prompt, rational combination therapy to suppress active rheumatic inflammation. Primary treatment includes antibiotics—especially penicillin—to eliminate streptococcal infection, along with anti-rheumatic agents such as naproxen, aspirin, ibuprofen, glucocorticoids, and immunosuppressants. Patients should also adhere to appropriate daily care measures to prevent disease exacerbation and safeguard overall health.

The above provides an overview of erythema marginatum in rheumatic fever. We hope this information proves helpful.