Dengue Fever in Bali: Symptoms, Testing & Care

Dengue Symptoms: What It Feels Like

Dengue is a viral infection spread by Aedes mosquitoes, which bite mainly during the day — early morning and late afternoon. Indonesia, including Bali, has frequent or continuous dengue transmission. Symptoms usually appear 4–10 days after an infected bite and last 2–7 days. Many infections are mild, but the illness can become severe in a small number of people.

Sudden high fever

Often around 40°C (104°F)

Severe headache

Often with pain behind the eyes

Muscle and joint pain

The reason dengue is called "breakbone fever"

Nausea and vomiting

Loss of appetite is common

Rash

Often appears a few days into the illness

Swollen glands

Tender lumps in the neck or armpits

Dengue, flu or Bali Belly?

Main clue	More likely
High fever + severe headache, eye pain, strong body aches	Dengue — get a blood test
Diarrhoea and stomach cramps are the main problem	Bali Belly / food poisoning
Fever with sore throat, cough, runny nose	Flu or another respiratory virus

Symptoms overlap. If you have a fever in Bali that lasts more than a day or two, a doctor's assessment and blood test give a clear answer.

How Dengue Usually Progresses

Fever phase · about days 1–7

High fever, headache, body aches and tiredness. This is the best time to confirm dengue with an NS1 or PCR test. Rest, drink plenty of fluids and use paracetamol for fever.

Critical phase · when the fever drops · typically 24–48 hours

Most people start to improve, but this is when severe dengue can develop: fluid can leak from blood vessels and the platelet count often falls. Feeling better because the fever is gone does not mean the danger is over. Keep watching for warning signs and keep up follow-up blood tests if your doctor advises them.

Recovery phase

Appetite returns and the platelet count recovers. Most people recover within 1–2 weeks, though tiredness can last several weeks.

Warning Signs: Go to Hospital Now

These signs often appear around the time the fever goes away. Do not wait for a home visit — go to the nearest hospital emergency department, or call 118 / 112.

•Severe abdominal pain
•Persistent vomiting
•Bleeding gums or nose
•Blood in vomit or stool
•Rapid breathing
•Restlessness or extreme tiredness
•Intense thirst
•Pale, cold or clammy skin, weakness

Pregnant women with dengue should always be assessed and cared for in hospital.

Dengue Testing in Bali: Which Test and When

The right test depends on how many days you have had symptoms. A blood sample can be taken at your hotel or villa and processed by a certified laboratory.

Days since symptoms began	Recommended test	What it shows
Days 0–7	NS1 antigen or PCR, plus IgM antibody	Detects the virus itself early in the illness
After day 7	IgM antibody	Shows a recent infection
Throughout the illness	Complete blood count (CBC)	Platelets and haematocrit — used to follow the illness, often repeated

Important: a negative NS1 test does not rule out dengue. If symptoms fit, your doctor may repeat the test, add an IgM test or follow your platelet count.

At Dewa Medical, basic blood panels (CBC + CRP) start from IDR 350,000, and the mobile visit fee for hotel or villa collection is IDR 450,000 per visit, covering all tests taken in that visit. The price of the dengue NS1 test is confirmed when you book. See our lab testing page and blood test cost guide for details.

Treating Dengue: What Helps and What to Avoid

Do

Rest as much as possible
Drink plenty of fluids — water, oral rehydration solution, soups, juices
Use paracetamol (acetaminophen) for fever and pain, at the dose on the pack
Keep a note of when the fever started and how much you are drinking and urinating
Use repellent and sleep under a net or in an air-conditioned room — during the first week, mosquitoes that bite you can pass dengue to others

Avoid

Ibuprofen, aspirin and other NSAIDs — they can increase bleeding risk
Alcohol while you are unwell
Flying during the fever or the critical phase without a doctor's advice
Assuming you are better just because the fever has stopped

What a home-visit doctor does for suspected dengue

Examines you and checks for warning signs, blood pressure and hydration.
Takes blood for NS1 and a complete blood count at your hotel or villa.
Arranges follow-up blood counts, usually every day or two, while you are in the risk period.
Refers you to hospital straight away if warning signs appear.

About IV drips: most people with dengue do not need IV fluids during the fever phase — drinking enough is usually the best approach. A doctor may give IV fluids only when there is a clear medical reason, such as dehydration from vomiting. People with warning signs need hospital care, where fluids can be monitored closely.

Preventing Dengue in Bali

• Use repellent containing DEET, picaridin or IR3535, especially in the early morning and late afternoon.
• Wear long sleeves and trousers in gardens and at dusk; stay in rooms with screens or air conditioning.
• Empty standing water around your villa, such as flower pots, buckets and drains.
• You can get dengue more than once. A second infection carries a higher risk of severe dengue, so keep protecting yourself even if you have had it before.

A dengue vaccine (Qdenga) is available in Indonesia. Whether it suits you depends on your age, travel plans and history — see our dengue vaccine in Bali guide and ask a doctor.

Dengue Fever in Bali — FAQ

How do I know if I have dengue or just a flu or Bali Belly?

Dengue usually starts suddenly with a high fever (often around 40°C), a severe headache, pain behind the eyes and strong muscle and joint aches. Diarrhoea is not the main symptom, which helps tell it apart from Bali Belly, and a runny nose or cough is less typical than with flu. Symptoms overlap, so a blood test is the only reliable way to know.

When should I get a dengue blood test?

In the first 7 days of fever, CDC recommends an NS1 antigen test or a PCR test together with an IgM antibody test. After day 7, the IgM test is the main test. A negative NS1 result does not rule out dengue, so a doctor may repeat testing or check your blood count if symptoms continue.

Which painkillers are safe with dengue?

Use paracetamol (acetaminophen) for fever and pain. Avoid ibuprofen, aspirin and other NSAIDs, because they can increase the risk of bleeding in dengue.

Is the danger over when the fever goes away?

No. Severe dengue usually develops around the time the fever drops, in a critical phase that typically lasts 24–48 hours. Watch closely for warning signs such as severe abdominal pain, persistent vomiting, bleeding gums or nose, blood in vomit or stool, rapid breathing, restlessness or extreme tiredness, and go to hospital immediately if any appear.

Can dengue be treated at my villa?

Many people with dengue and no warning signs recover at home with rest, oral fluids, paracetamol and regular blood count checks. A home-visit doctor can examine you, take blood samples and follow you up daily. IV fluids are not routinely needed during the fever phase and are given only when a doctor finds a clear reason. Anyone with warning signs, and anyone who is pregnant, should be cared for in hospital.

Can I fly home with dengue?

Ask a doctor before flying. Flying during the fever or the critical phase is not recommended, because complications can develop quickly. A doctor can check your blood count and give you a fit-to-fly letter when it is safe. See also too sick to fly from Bali.

Can I get dengue again?

Yes. There are four types of dengue virus, and infection with one does not protect you from the others. A second infection carries a higher risk of severe dengue, so mosquito protection remains important for people who have had dengue before.

Dengue Fever in Bali —
Symptoms, Testing & When to See a Doctor