The evaluation of Rocky Mountain spotted fever begins with a history and physical exam.

Physical findings in someone with Rocky Mountain spotted fever may include:

• Fever
• Joint swelling
• Muscle tenderness
• Rash:
• Pink rash begins on the wrists and ankles, and then spreads to the trunk
• The rash becomes a deep red or dusky color and becomes slightly raised
• Stiff neck

Tests are necessary to make the diagnosis of Rocky Mountain spotted fever.

Tests that may be used to evaluate Rocky Mountain spotted fever include:

• Blood fluorescent antibody titer
• Electrolyte profile
• Blood culture
• Complete blood count
• Febrile agglutinins
• Lumbar puncture
• Skin biopsy