Dengue Fever

Dengue fever is a mosquito-borne viral infection caused by the dengue virus. It is common in many tropical and subtropical regions. Symptoms can range from a mild flu-like illness to severe disease with bleeding, plasma leakage, and shock. ^[1][2]

What is dengue fever?

Dengue is usually spread by infected Aedes mosquitoes, especially Aedes aegypti. The illness often begins suddenly with fever and generalized body symptoms after a mosquito bite in an affected area. ^[1][3]

What are the symptoms?

Typical symptoms include high fever, severe headache, pain behind the eyes, muscle and joint pain, nausea, vomiting, rash, and marked tiredness. Some people describe it as feeling like a bad flu. ^[1][2]

Causes and risk factors

The infection is caused by dengue virus and spreads through mosquito bites rather than ordinary casual contact. Living in or traveling to endemic areas increases risk. Prior dengue infection may affect the risk profile in future infections. ^[1][2][3]

How is it diagnosed?

Doctors consider travel or exposure history, symptoms, physical findings, and laboratory testing. Because dengue can resemble other infections, testing and clinical monitoring are important, especially if warning signs develop. ^[1][2]

Treatment and management

There is no specific cure for most routine dengue cases; management is mainly supportive. Rest, fluids, and careful monitoring are central. Some pain medicines may be safer than others, and people should avoid taking medications that increase bleeding risk unless specifically advised by a clinician. ^[1][2][4]

Complications and daily life

A small proportion of patients develop severe dengue, which can cause bleeding, low blood pressure, organ involvement, or shock. Warning signs often appear around the time the fever starts to come down rather than at the peak of fever. ^[1][2]

When should you see a doctor?

Urgent medical evaluation is needed for persistent vomiting, severe abdominal pain, bleeding, extreme weakness, shortness of breath, confusion, or signs of dehydration. Anyone with suspected dengue who is worsening should be medically assessed promptly. ^[1][2]

Follow-up and prevention

The best prevention is avoiding mosquito bites: reducing standing water, wearing protective clothing, and using repellents or screened environments where appropriate. Travelers should know the risk in their destination. ^[1][3]

This content does not replace diagnosis. Personal medical care is recommended for suspected dengue or warning signs. ^[1][2]

FAQ

Can dengue begin like the flu?

Yes. Early symptoms may look similar to flu, but dengue has a different cause and risk profile. ^[1][2]

Does dengue spread from person to person?

Not through routine casual contact; it is mainly transmitted by infected mosquitoes. ^[1][3]

When should severe dengue be suspected?

When warning signs such as severe pain, persistent vomiting, bleeding, lethargy, or breathing problems appear. ^[1][2]

Which pain reliever should be used at home?

Medication choices should follow medical advice because some drugs may increase bleeding risk. ^[1][2]

What is the most effective protection?

Avoiding mosquito bites and limiting mosquito breeding sites are key preventive steps. ^[1][3]