Dengue
Dengue is a viral illness spread by infected mosquitoes. Fever with headache, pain behind the eyes, body aches, nausea, or rash can be dengue, but only a blood test can confirm it. Urgent warning signs can begin as the fever goes away.
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In simple words
Dengue is a viral infection spread through the bite of an infected mosquito. Many infections cause no symptoms, while others cause sudden fever with headache, pain behind the eyes, muscle or joint aches, nausea, vomiting, or rash. It can look like other fever illnesses, so testing and clinical assessment matter. Most people recover, but severe dengue can become an emergency within hours.
A mosquito-borne illness caused by dengue viruses. It is not spread by casual person-to-person contact. A person with dengue can, however, pass virus to another mosquito during the early fever period, so bite prevention helps protect the household and community.
Common causes
- A bite from an infected Aedes mosquito
- Living in or recently travelling to an area with dengue transmission
- Exposure around places where mosquitoes breed, including containers that collect water
Risk Factors
- Previous dengue infection can increase the chance of severe disease during a later infection
- Pregnancy, infancy, older age, obesity, or conditions such as diabetes, kidney disease, or immune suppression may need closer clinical follow-up
- Not being able to drink enough, pass urine normally, return quickly for review, or monitor warning signs at home
Common symptoms
- Sudden fever with severe headache, pain behind the eyes, muscle, bone, or joint aches
- Nausea, vomiting, tiredness, swollen glands, or a rash
- Symptoms commonly last two to seven days; improvement in fever does not by itself mean the risk period is over
- Warning signs can appear in the 24–48 hours after fever settles
Clinical Red Flags
Seek urgent medical attention at an emergency department or primary care clinic if you present with any of the following symptoms:
- Severe belly pain or tenderness, persistent or repeated vomiting, or inability to keep fluids down
- Bleeding from the gums or nose, blood in vomit or stool, unusual bruising, or black stools
- Extreme tiredness, restlessness, drowsiness, confusion, pale or cold skin, rapid breathing, or fainting
- Very little urine, severe thirst, worsening weakness, pregnancy, infancy, older age, or important long-term health conditions—seek prompt clinical advice
Lifestyle & diet support
Follow the hydration and review plan given by a clinician, rest, and keep track of fluids taken and urine passed if advised. Prevent mosquito bites while unwell and during recovery: use screens or nets, wear covering clothing when practical, and use locally approved repellents as directed. Around the home, cover water-storage containers and empty or scrub containers that can collect water. Do not rely on a falling fever as proof of recovery; keep watching for warning signs for the next two days.
Treatment Approaches
Conventional Management
There is no specific antiviral treatment for dengue. A clinician may recommend close monitoring, oral fluids if safe, and paracetamol/acetaminophen for fever or pain if appropriate for the person. Avoid aspirin and ibuprofen unless a clinician specifically says they are safe, because they can increase bleeding risk. Seek urgent care for any warning sign—especially after the fever comes down. Hospital care may be needed for warning signs, severe dengue, dehydration, or people at higher risk.
Homeopathic Approach
Reliable clinical evidence has not established homeopathy as a treatment for dengue. It must not replace diagnostic testing, hydration, monitoring, clinically recommended fever relief, or urgent hospital care for warning signs or severe dengue.
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Diagnosis & tests
Investigation Protocol
A clinician considers symptoms, recent residence or travel, and local outbreaks. A blood test is the only way to confirm dengue. During early illness, testing may include molecular or NS1 antigen tests with antibody testing; the best test depends on the day of illness and local laboratory guidance. A clinician may also order a complete blood count and repeat it when indicated, but platelet count alone should not be used to judge how unwell someone is.
Differential Diagnosis
Malaria, chikungunya, enteric fever, influenza, COVID-19, leptospirosis, other viral fevers, and some bacterial illnesses can cause overlapping fever, aches, rash, or vomiting. Do not self-diagnose a fever as dengue.
- Dengue NAAT/PCR or NS1 antigen testing during early illness, according to local availability
- Dengue IgM testing later in the illness when clinically appropriate
- Complete blood count and other blood tests to monitor illness when a clinician advises
Imaging is not needed to diagnose uncomplicated dengue, but hospital teams may use ultrasound or chest imaging if they suspect fluid leakage or another complication.
Differential Diagnosis Matrix
Malaria, chikungunya, enteric fever, influenza, COVID-19, leptospirosis, other viral fevers, and some bacterial illnesses can cause overlapping fever, aches, rash, or vomiting. Do not self-diagnose a fever as dengue.
Reference Citations & Evidence Sources
Clinical Reviews & Textbooks
- CIT-0103Centers for Disease Control and Prevention. "Symptoms of Dengue and Testing." Centers for Disease Control and Prevention (2026).
- CIT-0104World Health Organization. "Dengue." World Health Organization (2026).
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