Home > Patients & Visitors > Health Library > Dengue Fever
Dengue (say "DEN-gay") fever is a disease caused by a virus that is carried by mosquitos. Mild cases cause a rash and flu-like symptoms. Some people, especially children, can get more serious forms of the illness, known as dengue hemorrhagic fever and dengue shock syndrome.
Dengue fever is spread through the bite of mosquitoes that carry the virus. The virus cannot spread from person to person through casual contact. People who have dengue fever should be protected from mosquito bites. If a mosquito bites an infected person, the mosquito becomes infected with the virus and can pass it to other people.
Outbreaks are common in many countries in Latin America and Southeast Asia. The disease also occurs in Africa, parts of the Middle East, the Western Pacific, Puerto Rico, and other tropical and subtropical areas.footnote 1 Travelers visiting these regions may become infected.
Dengue fever is rare in the continental United States. But there have been cases of dengue fever reported in Florida and areas of the southwestern U.S., especially along the border between Texas and Mexico.footnote 2, footnote 3
Symptoms of dengue fever may be mild or severe. In mild cases, common symptoms include:
The fever usually lasts up to a week and may come and go.
After the initial fever, some people may have more serious symptoms that may be signs of dengue hemorrhagic fever. These can include:
If you have symptoms of dengue fever, see your doctor or go to the hospital right away.
You doctor will ask about your symptoms and any recent travel. He or she may order a blood test to confirm whether you have dengue fever.
There is no medicine for treating dengue fever. Mild cases may be treated at home with rest and plenty of fluids to prevent dehydration. You may take acetaminophen (Tylenol) for pain. But don't take anti-inflammatory medicines like aspirin, ibuprofen (such as Advil or Motrin), or naproxen (such as Aleve). They may increase the risk of bleeding. Be safe with medicines. Read and follow all instructions on the label. People with mild cases of dengue fever usually feel better within 2 weeks.
Dengue hemorrhagic fever, the more serious form of dengue fever, usually requires treatment in a hospital. You may need intravenous (IV) fluids to treat dehydration. You also may need a blood transfusion to replace lost blood. You will be closely watched for signs of shock.
There is no vaccine to prevent dengue fever. And people who have had it before can get it again. If you plan to travel to an area where dengue fever is common, make sure to protect yourself against mosquito bites. Here are some guidelines:
The most current information about dengue fever is available from the Centers for Disease Control and Prevention (CDC) and the World Health Organization (WHO). If you are planning international travel, you can learn about the risk of dengue fever in the area you're traveling to by contacting:
Centers for Disease Control and Prevention (2010). Dengue: Epidemiology. Available online: http://www.cdc.gov/Dengue/epidemiology/index.html.
Centers for Disease Control and Prevention (2010). Locally acquired dengue—Key West, Florida, 2009–2010. MMWR, 59(19): 577–581. Also available online: http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5919a1.htm.
Centers for Disease Control and Prevention (2007). Dengue hemorrhagic fever—U.S.-Mexico border, 2005. MMWR, 56(31): 785–789. Also available online: http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5631a1.htm. [Erratum in MMWR, 56(32):822. Also available online: http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5632a5.htm.]
ByHealthwise StaffPrimary Medical ReviewerE. Gregory Thompson, MD - Internal MedicineAdam Husney, MD - Family MedicineSpecialist Medical ReviewerLeslie Tengelsen, PhD, DVM -
Current as ofMay 24, 2016
Current as of:
May 24, 2016
E. Gregory Thompson, MD - Internal Medicine & Adam Husney, MD - Family Medicine & Leslie Tengelsen, PhD, DVM -
To learn more about Healthwise, visit Healthwise.org.
© 1995-2016 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.
Our interactive Decision Points guide you through making key health decisions by combining medical information with your personal information.
You'll find Decision Points to help you answer questions about:
Get started learning more about your health!
Our Interactive Tools can help you make smart decisions for a healthier life. You'll find personal calculators and tools for health and fitness, lifestyle checkups and pregnancy.
Feeling under the weather?
Use our interactive symptom checker to evaluate your symptoms and determine appropriate action or treatment.