Sandfly fever is a viral illness caused by the sandfly bite, primarily found in tropical and subtropical regions. The disease is transmitted by the bite of infected female sandflies, which are most active during dusk and dawn. Symptoms typically include fever, headache, and joint pain, and the illness usually resolves within a week. While sandfly fever is generally not severe, it can cause discomfort and may lead to complications in some cases. Preventive measures include using insect repellent, wearing protective clothing, and avoiding areas with high sandfly populations, especially during peak activity times.