Possible Causes of Afternoon Fever and Aches: Lyme Disease & Rocky Mountain Spotted Fever

* Lyme disease. Lyme disease is a bacterial infection transmitted by ticks. Symptoms can include fever, chills, muscle aches, joint pain, and fatigue. These symptoms typically start within 3 to 30 days after being bitten by an infected tick and may come and go.

* Rocky Mountain spotted fever. Rocky Mountain spotted fever is a bacterial infection transmitted by ticks. Symptoms can include fever, chills, muscle aches, joint pain, headache, and a rash. The rash typically starts on the wrists and ankles and then spreads to the rest of the body.

* Ehrlichiosis. Ehrlichiosis is a bacterial infection transmitted by ticks. Symptoms can include fever, chills, muscle aches, joint pain, headache, and fatigue.

* Babesiosis. Babesiosis is a parasitic infection transmitted by ticks. Symptoms can include fever, chills, muscle aches, joint pain, fatigue, and weakness.

* Viral infections. Some viral infections, such as the flu and mononucleosis, can cause fever, chills, muscle aches, and joint pain. These symptoms typically start within a few days after exposure to the virus and may last for several days.

* Other medical conditions. Some other medical conditions that can cause fever and aching in the afternoon evenings include:

* Rheumatoid arthritis

* Lupus

* Fibromyalgia

* Chronic fatigue syndrome

* Cancer

If you are experiencing fever and aching in the afternoon evenings only, it is important to see a doctor to get a diagnosis and appropriate treatment.