Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the symptoms of Rocky Mountain Spotted Fever (RMSF) ?
    ### Response:
    The first symptoms of Rocky Mountain spotted fever (RMSF) typically begin 2-14 days after the bite of an infected tick. A tick bite is usually painless and about half of the people who develop RMSF do not remember being bitten. The disease frequently begins as a sudden onset of fever and headache and most people visit a healthcare provider during the first few days of symptoms.
    