A rapid spike in body temperature (104°F or more) is usually the first symptom of dengue fever. If the fever lasts more than 2 days, it's time to get tested.
Dengue often causes intense headaches, especially pain behind the eyes. This discomfort may increase with eye movement or bright light.
The virus causes deep muscle pain and joint aches, giving dengue the nickname "breakbone fever." This symptom is often disabling.
A red, itchy skin rash appears a few days after fever onset. It may spread over the body and can resemble measles in some cases.
One of the most dangerous effects of dengue is a drop in platelet levels, which can lead to internal bleeding. A CBC test is essential.
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