Rash myths and misconceptions set straight
Lyme disease rash is:
- Sometimes but not usually a ring within a ring Bull’s-eye rash appearance
- Often mistaken for a spider bite but is not a spider bite
- Not always present. Not everyone has a rash.
Characteristics of Lyme disease rash:
- Large expanding red round rash
- Greater than 2” in diameter
- Bull’s eye appearance of rash appears in the minority of Lyme disease cases
- Uniformly red in the majority of cases
A leading cause of misdiagnosis is the failure to recognize the Lyme disease rash, when present.
Available blood tests are antibody-based for Lyme disease and do not accurately diagnose Lyme disease in the first few weeks of infection. False negative tests are a problem in acute Lyme disease. Therefore, early Lyme disease is a clinical diagnosis. Recognizing signs and symptoms can be vital to receiving appropriate early treatment and patient care, especially in the COVID-19 era.
Lyme Disease Awareness Month Information
Receive the Latest News from the Johns Hopkins Lyme Disease Research Center
Join our mailing list to receive the latest news and updates from Johns Hopkins Rheumatology and the Johns Hopkins Lyme Disease Research Center.