Removal · field guidance

Skin-marker outline of EM rash

Tracing the rash border daily creates a low-tech record of expansion, useful evidence for clinicians evaluating possible erythema migrans.

Steps

schema.org/HowTo

01
Use a washable skin marker or pen to trace the rash edge once a day.
02
Date each outline next to the line.
03
Photograph the marked area each day for the patient record.
04
EM typically expands at least 5 cm over days, distinguishing it from a tick-bite hypersensitivity reaction.
05
Bring the photo log to the medical visit; it speeds the clinical decision.

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