The term "breakbone fever" is most commonly known as dengue. Dengue is a viral infection that is transmitted through the bite of infected mosquitoes. The name "breakbone fever" comes from the severe muscle and joint pain that is a common symptom of the disease. In addition to muscle and joint pain, dengue can cause high fever, severe headache, rash, and pain behind the eyes. The illness typically lasts about a week and can be quite debilitating. While dengue is most commonly found in tropical and subtropical regions, it is a global health concern, with an estimated 390 million infections occurring each year. There is no specific treatment for dengue, so management generally involves supportive therapy to relieve symptoms and prevent complications. It is important to note that while the provided answer is generally correct, it is always advisable to consult a healthcare professional for accurate diagnosis and treatment.