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Why is erythema migrans a clinical diagnosis?
A characteristic expanding rash is assessed from its appearance and history because early blood tests may not yet be positive.
Reviewed by VuxLore® Knowledge Team For Everyone
Short answer
At a glance
Key takeaways
Direct answer
A characteristic expanding rash is assessed from its appearance and history because early blood tests may not yet be positive.
Use it in context
Use NHS and NICE guidance in the UK; diagnosis and treatment belong to qualified clinicians.
Practical next step
This article is educational and cannot diagnose, exclude or treat illness. Use NHS 111, a GP, emergency services or the corresponding local service according to symptom severity.
Sources and further reading
UK Lyme disease guidance and data
For current UK clinical advice, public-health guidance and surveillance data, consult these primary national sources.