What are the symptoms of a tick-borne illness?

Any & every symptom!: The most common tick-borne illness is lyme disease, which is well-known to cause any & every symptom that a person can have! other tick-borne illnesses like rocky mountain spotted fever, babesiosis and bartonella also cause a wide variety of symptoms. Still, the most common symptoms of tick-borne illness are fever & rash (especially at onset), joint pains, malaise, headache & fatigue.