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Educational use only: Symptom.Today is an educational tool and does not provide medical advice, diagnosis, or treatment. Results are not a substitute for professional medical care. If symptoms are severe, worsening, or concerning, seek medical attention immediately. In an emergency, call your local emergency number.
Infectious DiseaseSerious

Dengue fever

Dengue fever is a viral infection transmitted to humans through the bite of infected mosquitoes, common in tropical and subtropical climates. While many cases are mild, it can develop into a severe, life-threatening condition characterized by bleeding and drop in blood pressure.

Severity
Serious
System
Whole body
Progression
Slow / Silent
Treatable
Yes — with early detection
Common age
All ages
Duration
Acute → may persist
Contagious
Sometimes
Emergency risk
High
Whole body
Affected area: Whole body

Overview

Dengue fever is a viral infection transmitted to humans through the bite of infected mosquitoes, common in tropical and subtropical climates. While many cases are mild, it can develop into a severe, life-threatening condition characterized by bleeding and drop in blood pressure.

Symptoms

Click any symptom to analyze
Primary symptoms

No symptoms mapped yet.

Causes

  • •Dengue virus (DENV-1 through DENV-4)
  • •Bite from an infected Aedes aegypti mosquito
  • •Bite from an infected Aedes albopictus mosquito

Risk factors

  • •Living in or traveling to tropical regions
  • •Previous infection with a different dengue serotype
  • •High mosquito population density near home
  • •Stagnant water sources nearby

How it progresses

3 stages
  1. Stage 1 — Early
    Mild or intermittent symptoms; easily mistaken for something minor.
    Often missed
  2. Stage 2 — Progressive
    Symptoms become more frequent or severe.
  3. Stage 3 — Established
    Daily life affected; medical care strongly recommended.

How it's diagnosed

  • •Blood tests (PCR or NS1 antigen)
  • •Antibody testing (IgM/IgG)
  • •Physical examination and travel history
  • •Complete blood count (CBC) to check platelets

Treatment options

General educational information only — no dosage advice. Always follow guidance from a qualified clinician.

Medical
  • •Monitoring of platelet counts and blood pressure
  • •Supportive care for symptom management
  • •Hospitalization for severe dengue cases
Home care
  • •Drinking plenty of water and electrolyte fluids
  • •Resting at home under a mosquito net
  • •Using acetaminophen for pain and fever relief
  • •Avoiding NSAIDs (like Ibuprofen or Aspirin)
  • •Fluid replacement therapy (oral or IV)

Complications

  • •Long-term damage if untreated
  • •Reduced quality of life
  • •Worsening symptoms over time
  • •Recurrence of dengue fever

Prevention

  • •Maintain a healthy lifestyle
  • •See a clinician for routine check-ups

When to seek help

Urgent — same-day care
  • •Symptoms persist beyond a few days
  • •Symptoms interfere with daily activities
  • •New or worsening symptoms appear
  • •Concerning changes related to dengue fever
🚨 Emergency — call now
  • Severe abdominal pain or persistent vomiting
  • Bleeding from gums or nose
  • Blood in urine or stool
  • Rapid breathing and extreme fatigue
  • Cold or clammy skin

In any emergency, call your local emergency number or go to the nearest emergency department.

Real-world questions

  • ›Can Dengue fever cause headaches?
  • ›Is Dengue fever reversible?
  • ›How quickly does Dengue fever progress?
  • ›Is Dengue fever hereditary?
  • ›Can Dengue fever be prevented?

Compare conditions

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Frequently asked questions

What causes Dengue fever?

Possible causes of Dengue fever include Dengue virus (DENV-1 through DENV-4), Bite from an infected Aedes aegypti mosquito, Bite from an infected Aedes albopictus mosquito.

Is Dengue fever dangerous?

Dengue fever can be serious and may require prompt medical attention, especially if symptoms are severe or worsening.

How long does Dengue fever last?

Duration varies between individuals. Many cases improve with appropriate care, while others may persist longer and require ongoing management.

Can Dengue fever go away on its own?

Dengue fever typically benefits from medical evaluation and should not be ignored.

When should I see a doctor about Dengue fever?

Consider seeing a clinician if symptoms are severe, persistent, worsening, or if you have any concerns related to general.

Sources

Information based on general medical references such as:

CDCNHSWHOMedlinePlus

Last reviewed: May 2026

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Educational use only: Symptom.Today is an educational tool and does not provide medical advice, diagnosis, or treatment. Results are not a substitute for professional medical care. If symptoms are severe, worsening, or concerning, seek medical attention immediately. In an emergency, call your local emergency number.