Dengue fever symptoms vary, making it crucial to know what to look for. From early signs like nausea and headaches to severe symptoms such as bleeding gums and abdominal pain, this guide provides key insights to help you take swift action. Dengue fever symptoms vary, making it crucial to know what to look for. From early signs like nausea and headaches to severe symptoms such as bleeding gums and abdominal pain, this guide provides key insights to help you take swift action.