Afternoon Fever and Aches: Could It Be Tick‑Borne Illness?

Recurrent afternoon fever with muscle/joint aches raises suspicion for tick‑borne diseases.

Tick‑Borne Considerations

  • Lyme disease: Fever, chills, migrating joint pain, fatigue; rash (EM) in 70–80%.
  • Rocky Mountain spotted fever: Fever, headache, rash starting wrists/ankles.
  • Ehrlichiosis/Anaplasmosis: Fever, myalgia, headache, leukopenia.
  • Babesiosis: Fever, chills, hemolytic anemia.

Other Causes

  • Viral infections (influenza, mono)
  • Autoimmune (RA, lupus, fibromyalgia)
  • Chronic fatigue syndrome
  • Malignancy

Next Step

See a physician for targeted testing (serology, PCR) based on exposure history and exam findings.

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