What should you know about rocky mountain tick fever rash?

The rash may start as small flat or raised spots and can spread over the body. It may involve the wrists, ankles, trunk, palms or soles, but patterns vary. A rash does not prove the cause: Cellulitis, Chickenpox, COVID-19 and other illnesses can also change the skin. The key context is a new feverish illness with headache, muscle aches or tiredness after possible tick exposure.

Contact a clinician urgently if a rash appears with fever after outdoor activity, travel or a known tick bite. Photograph the rash in good light, note when it began, and record any new medicines, foods or skin products. Avoid scratching and do not rely on a home rash checker to decide whether care is needed. If a tick remains attached, seek advice on careful removal and note the exposure.

Get emergency help for a rapidly spreading or darkening rash, confusion, severe headache, breathing difficulty, fainting, seizures, repeated vomiting, or marked drowsiness. A feverish person who is deteriorating needs urgent assessment even if the rash is mild or missing. Do not wait for the skin findings to become distinctive.

Ask whether the rash pattern and illness history suggest a tick-borne infection, what other causes need consideration, which treatment decisions are time-sensitive, and how to monitor for worsening.