Many people, especially children and teens, may experience no signs or symptoms during a mild case of dengue fever. When symptoms do occur, they usually begin four to seven days after you are bitten by an infected mosquito.
Dengue fever causes a high fever â 104 F degrees â and at least two of the following symptoms:
- Muscle, bone and joint pain
- Pain behind the eyes
- Swollen glands
Most people recover within a week or so. In some cases, symptoms worsen and can become life-threatening. Blood vessels often become damaged and leaky. And the number of clot-forming cells (platelets) in your bloodstream drops. This can cause a severe form of dengue fever, called dengue hemorrhagic fever, severe dengue or dengue shock syndrome.
Signs and symptoms of dengue hemorrhagic fever or severe dengue â a life-threatening emergency â include:
- Severe abdominal pain
- Persistent vomiting
- Bleeding from your gums or nose
- Blood in your urine, stools or vomit
- Bleeding under the skin, which might look like bruising
- Difficult or rapid breathing
- Cold or clammy skin (shock)
- Irritability or restlessness
When to see a doctor
Call 911 or go to the nearest emergency room if you've recently visited a region in which dengue fever is known to occur and you develop emergency symptoms, such as severe abdominal pain, vomiting, difficulty breathing, or blood in your nose, gums, vomit or stools.
If you develop a fever and milder symptoms common to dengue fever, call your doctor.