Dengue kanamalı ateşi, a severe form of dengue fever, is caused by the dengue virus, which is transmitted through the bites of infected Aedes mosquitoes. Symptoms include high fever, severe headache, pain behind the eyes, joint and muscle pain, and rash. In some cases, it can lead to serious complications, including bleeding and organ impairment. The condition is more common in tropical and subtropical regions, where the Aedes mosquitoes thrive. Prevention focuses on reducing mosquito exposure through the use of insect repellent, wearing protective clothing, and eliminating standing water where mosquitoes breed. Early diagnosis and proper medical care are crucial for recovery.