<human>:  What are the symptoms of Dengue fever?
<bot>: The most common symptoms of Dengue fever are high fever, severe headaches, pain behind the eyes, joint and muscle pain, fatigue, and a rash. Other symptoms may include nausea, vomiting, swollen glands, and bleeding from the nose or gums. In severe cases, dengue fever can also cause abdominal pain, severe problems with blood platelets, and difficulty breathing.