Dengue Symptoms and Warning Signs: What Every Family in Bangladesh Should Know

Status: Pending Qualified Medical Review. This article has not yet been reviewed by a qualified medical professional.

Every monsoon, dengue becomes a household worry in Bangladesh. One person in the family gets a high fever, and everyone asks the same question: "Is this dengue, and is it dangerous?"

Most people with dengue recover with rest, fluids and careful monitoring. But a small number develop severe dengue, which can become life-threatening within hours. The key is knowing which dengue symptoms are expected and which are warning signs.

What Is Dengue?

Dengue is a viral infection spread by the bite of infected Aedes mosquitoes, mainly Aedes aegypti. These mosquitoes breed in clean, still water — flower pots, buckets, tyres, AC trays, construction sites and rooftop containers. They bite mostly during the day, especially early morning and late afternoon.

There are four types (serotypes) of dengue virus. According to the WHO, getting one type gives lifelong protection against that type only. A later infection with a different type can increase the risk of severe dengue.

Transmission in Bangladesh usually rises during and after the rainy season, although cases can occur in other months too.

Common Dengue Symptoms

Symptoms usually start 4 to 10 days after the mosquito bite (WHO). The CDC notes that about 1 in 4 infected people become sick; many have mild or no symptoms.

The most common symptom is fever, often high, with one or more of these:

• Headache
• Pain behind the eyes
• Muscle, joint or bone pain (why dengue was once called "breakbone fever")
• Nausea or vomiting
• Skin rash
• Tiredness and weakness
• Loss of appetite

Symptoms typically last 2–7 days. Mild dengue can look like flu, typhoid, chikungunya or COVID-19, so a blood test is the only way to confirm it.

Example

Tanvir, 22, a student in Dhaka, gets a sudden fever of 103°F with severe body pain and pain when moving his eyes. He has no cough or runny nose. In dengue season, this pattern should make him and his family think of dengue and get tested.

The Phases of Dengue: Why "Fever Gone" Does Not Mean "Safe"

Dengue illness is often described in three phases.

1. Febrile (fever) phase — about days 1–3

High fever, body aches, headache and eye pain. Rest, fluids and paracetamol for fever are commonly advised.

2. Critical phase — often around days 3–7

This often happens when the fever starts to come down. In some people, blood vessels become leaky, and fluid moves out of the bloodstream. This can cause a drop in blood pressure and shock. The CDC says warning signs usually begin in the 24–48 hours after the fever goes away.

Many families relax when the temperature drops. This is exactly the time to watch most closely.

3. Recovery phase

Fluid returns to the bloodstream, appetite improves, and the person slowly regains strength. Tiredness can last for weeks.

Warning Signs of Severe Dengue — Go to Hospital Immediately

The CDC and WHO list these warning signs. If you or a family member has any of them, go to a hospital straight away. Do not wait for an online reply.

• Belly pain or tenderness
• Vomiting at least 3 times in 24 hours
• Bleeding from the nose or gums
• Vomiting blood or blood in the stool (stool may look black)
• Feeling extremely tired, restless or irritable
• Difficulty breathing
• Cold, clammy skin
• Passing very little urine

About 1 in 20 people who get sick with dengue develop severe dengue (CDC). Severe dengue can cause shock, internal bleeding and organ damage, and needs hospital care.

Who is at higher risk?

Take extra care with:

• Infants and young children
• Pregnant women
• Older adults
• People with diabetes, high blood pressure, kidney, heart or liver disease
• People with obesity
• Anyone who had dengue before

How Is Dengue Tested?

A doctor may suggest tests based on how many days you have been sick:

• NS1 antigen test — most useful in the first few days of fever
• Dengue IgM/IgG antibody tests — more useful later in the illness
• Complete blood count (CBC) — to check platelets, white cells and haematocrit (blood concentration)

Repeat CBC tests are often needed to track changes. A rising haematocrit with falling platelets can be an important sign, so your doctor will interpret the trend — not just one number.

The CDC notes that a lab test is not always needed to start managing dengue. Your doctor may advise care based on your symptoms.

What You Should and Should Not Do at Home

If a doctor has said home care is safe for now (see our full dengue home care guide):

Do

• Rest as much as possible
• Drink plenty of fluids: water, ORS, soup, coconut water, fruit juice
• Use paracetamol for fever and pain, only at the dose a doctor or the package advises
• Keep track of fever, urine output and any warning signs
• Sleep under a mosquito net, even during the day, so mosquitoes do not bite you and spread it to others

Do not

• Do not take aspirin, ibuprofen or diclofenac (NSAIDs). The WHO advises avoiding them because they can increase bleeding risk.
• Do not take antibiotics unless a doctor finds a separate bacterial infection — antibiotics do not treat dengue
• Do not take injections or "platelet-boosting" products without medical advice
• Do not ignore symptoms just because the fever has gone

How to Prevent Dengue at Home

The WHO and DGHS recommend reducing mosquito breeding and bites:

• Empty, cover or clean any container holding water at least once a week
• Check flower pot trays, AC and fridge drip trays, rooftop tanks, and old tyres
• Use window and door screens
• Wear long sleeves and trousers
• Use mosquito repellent as directed on the label
• Use nets for babies and anyone sleeping during the day
• Talk to neighbours and building managers — mosquitoes do not respect flat boundaries

Frequently Asked Questions

What are the first symptoms of dengue?

Usually a sudden high fever with headache, pain behind the eyes, and body or joint pain. Some people also get nausea or a rash.

When should I get a dengue test?

If you have fever in dengue season, consult a doctor early. The NS1 test is most useful in the first days of fever.

Is dengue dangerous after the fever goes down?

It can be. Warning signs often appear within 24–48 hours after the fever settles. Watch closely in this period.

Can I take paracetamol for dengue?

Paracetamol is the medicine generally recommended for dengue fever and pain. Follow the correct dose. Avoid aspirin and ibuprofen.

Does papaya leaf juice cure dengue?

There is no proven cure for dengue. Do not rely on home remedies instead of medical monitoring. Ask your doctor before trying any herbal product.

Can I get dengue twice?

Yes. There are four types of dengue virus, and a second infection with a different type may carry a higher risk of severe dengue.

Get Early Advice from a Doctor on ShifaMate

If you have fever with body pain in dengue season and no warning signs, you can consult a verified doctor through ShifaMate. Share your temperature record, how many days you have had fever, and photos of any CBC or NS1 report. The doctor can guide you on tests, home care, and when you need to go to hospital. You can also browse ShifaMate doctors.

If any warning sign appears, go to the nearest hospital immediately or call 999.

References

• World Health Organization. Dengue and severe dengue (fact sheet)
• CDC. Symptoms of Dengue and Testing
• CDC. Dengue: Preventing mosquito bites
• Directorate General of Health Services (DGHS), Bangladesh
• NHS. Dengue

This article is for general information and does not replace advice from a qualified doctor.