Search results
Rocky Mountain spotted fever (RMSF) is an infection caused by the bite of an infected tick. It may occur anytime the weather is warm, but it most often occurs from April until September. It was first recognized in the Rocky Mountain states. But it may occur throughout the U.S.
Rocky Mountain spotted fever is a potentially fatal rickettsial infection that is transmitted by dog ticks and wood ticks. It causes a rash, headache, and high fever. People become infected when a tick carrying the infection bites them.
Mar 25, 2024 · Signs of RMSF rash are: Spots are small, flat, pink, and turn white when you apply pressure. Spots eventually become darker and raised, sometimes with small reddish spots ( petechiae ) Spots may merge into larger patches, and skin may break (ulcerate) Rocky Mountain Spotted Fever Symptoms.
