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What can an erythema migrans rash look like?

This CDC photograph shows one recognised bull's-eye presentation of erythema migrans, but Lyme rashes do not all look like this.

Reviewed by VuxLore® Knowledge Team For People

What can an erythema migrans rash look like?

Short answer

This CDC photograph shows one recognised bull's-eye presentation of erythema migrans, but Lyme rashes do not all look like this.

At a glance

Use this sourced example to understand one possible Lyme disease rash while remembering that appearance alone cannot diagnose infection.

Key takeaways

• A classic bull's-eye is only one possible presentation

• An expanding rash after possible tick exposure needs medical assessment

• Do not wait for a perfect ring before seeking advice about concerning symptoms

One recognised erythema migrans presentation

This CDC Public Health Image Library photograph shows an erythema migrans rash with central clearing. It is a documented example, not a test or a complete catalogue of Lyme rashes.

What this image cannot tell you

Not every erythema migrans rash forms a bull's-eye, and ordinary bite reactions can also be red. Consider exposure, change over time and symptoms, and seek appropriate medical advice.

Sources and further reading

NHS: Lyme disease

National Institute for Health and Care Excellence: Lyme disease: diagnosis and management (NG95)

US Centers for Disease Control and Prevention: What to Do After a Tick Bite