Relapsing fever is a term used to describe a bacterial infection characterized by recurrent episodes of fever. However, there are several synonyms used to describe this condition, including recurrent fever, borreliosis, recurrent typhus, and tick-borne relapsing fever. These terms are used interchangeably to describe the same condition, which is caused by the bacteria Borrelia. The symptoms of relapsing fever can vary depending on the severity of the infection, but common symptoms include fever, headache, muscle pain, joint pain, and fatigue. Treatment typically involves antibiotics, such as doxycycline, and supportive care measures to manage symptoms. Although relapsing fever can be a serious condition, it is generally treatable with prompt diagnosis and appropriate treatment.