Dengue Symptoms: What to Watch For and When to Go to Hospital

Every monsoon season in India, dengue cases surge. The Aedes aegypti mosquito — the primary carrier of dengue virus — thrives in clean, stagnant water that accumulates during and after rains. In Noida and Delhi NCR, dengue is a real seasonal risk from July through October, with peaks in August and September.

Most dengue cases are self-limiting — the infection is unpleasant but manageable at home with supportive care. But a minority of cases progress to severe dengue, which can be life-threatening within hours if not recognised and treated. Knowing the difference between manageable dengue and warning signs that need hospital care is genuinely critical knowledge during the monsoon months.

What Is Dengue?

Dengue is a viral infection caused by the dengue virus (DENV), transmitted through the bite of an infected Aedes mosquito. There are four serotypes (DENV-1 through DENV-4). Infection with one serotype provides lifelong immunity to that serotype but not to the others. A second dengue infection with a different serotype carries significantly higher risk of severe disease.

The Aedes aegypti mosquito bites primarily during the day — unlike the malaria-carrying Anopheles mosquito which bites at night. It breeds in small collections of clear water: flower pot saucers, tyres, coolers, clogged gutters, water storage containers without lids, and anything that holds water for more than five days.

Dengue Symptoms: Phase by Phase

Dengue has three phases:

Phase 1 — Febrile Phase (Day 1–3)

High fever: typically 38.5–40°C, often rising suddenly. The fever may remit briefly and then return — giving the classic "saddle-back" pattern in some cases.

Severe headache: typically behind the eyes and forehead. The retroorbital pain (pain behind the eyes that worsens when moving the eyes or pressing on them) is characteristic of dengue and less common in malaria or flu.

Muscle and joint pain: dengue is sometimes called "breakbone fever" because the muscular and joint pain can be so severe it feels as though bones are breaking. This is not an exaggeration — the myalgia (muscle pain) and arthralgia (joint pain) are disproportionate to a typical viral fever.

Nausea and vomiting: common, particularly in the first 1–2 days.

Rash: a flushed, red appearance to the face is common early. A second, maculopapular rash (flat red spots with raised areas) often appears on day 3–5, typically starting on the trunk and spreading outward.

Fatigue and weakness: profound tiredness out of proportion to how long the fever has been present.

Loss of appetite: food and even water may be unappealing.

During this phase, platelet count typically begins to fall and white blood cell count drops (leucopenia). Blood tests done at this stage will often show these changes.

Phase 2 — Critical Phase (Day 4–6)

This is the most important phase to understand. Many patients feel the fever has reduced and assume they are recovering — but this is when the risk of severe disease is highest.

Warning signs — these require immediate hospital care:

• Persistent vomiting: three or more episodes in an hour, or inability to keep any oral fluids down
• Abdominal pain or tenderness: particularly in the right upper abdomen (over the liver area), or generalised severe abdominal pain — may indicate plasma leakage into the abdomen
• Rapid breathing: suggests fluid accumulation in the chest
• Bleeding: bleeding gums, nosebleed, blood in vomit, blood in urine or stool, excessive menstrual bleeding, or any unexplained bleeding
• Blood in vomit: vomiting that looks like coffee grounds
• Black, tarry stools (melaena): indicates gastrointestinal bleeding
• Liver enlargement: may cause right upper quadrant tenderness
• Restlessness or irritability: in children particularly — may indicate circulatory compromise
• Sudden drop in temperature after high fever with signs above: the fever settling can be a sign the critical phase has begun

Severe dengue (dengue haemorrhagic fever / dengue shock syndrome):

Some patients develop plasma leakage — the dengue virus increases vascular permeability and fluid leaks from blood vessels into surrounding tissues. This causes:

• Fluid in the abdomen (ascites) or around the lungs (pleural effusion)
• A rapid drop in blood pressure (shock)
• Very low platelet count (below 20,000–30,000) with bleeding risk
• Organ impairment — liver, kidneys, heart

Severe dengue requires hospitalisation, close monitoring, and careful fluid management. If caught early, outcomes are generally good. If missed or delayed, it can be fatal.

Phase 3 — Recovery Phase (Day 7–10)

The fever resolves, platelet count begins to rise, and appetite returns. Most patients feel substantially better. The rash often reappears in this phase as platelet count recovers.

Excessive fluid given intravenously during the critical phase may shift to the circulation during recovery, causing transient fluid overload — another reason why dengue management requires medical supervision rather than self-management with excessive IV drips.

Dengue vs Malaria vs Chikungunya: Key Differences

These three mosquito-borne infections overlap in season and some symptoms. Key differences:

| Feature | Dengue | Malaria | Chikungunya | |---|---|---|---| | Fever pattern | High, may saddle-back | Cyclic, with shivering | High, sudden | | Joint pain | Moderate-severe | Mild | Severe, often disabling | | Retroorbital pain | Yes, characteristic | Uncommon | Uncommon | | Rash | Yes, typical | Uncommon | Yes | | Platelet drop | Yes, significant | Mild | Mild | | Severe complications | Bleeding, shock | Cerebral malaria | Joint involvement prolonged | | Mosquito biting time | Day | Night | Day and night |

Blood tests (dengue NS1 antigen, dengue IgM/IgG antibodies, malaria RDT or smear) distinguish these accurately. Testing is important — treatment implications differ.

How to Test for Dengue

NS1 antigen test: detects dengue virus antigen in blood; positive in the first 1–5 days of fever. Turns negative as the immune response clears the antigen.

IgM and IgG antibodies: IgM appears from day 5 and persists weeks to months. IgG indicates past infection. If the NS1 is negative but dengue is suspected and it's past day 5, the antibody test is used.

Complete blood count (CBC): essential for monitoring. Platelet count and haematocrit are tracked to detect severity and plasma leakage. Low white blood cell count (leucopenia) alongside low platelets is characteristic of dengue.

Testing should be done at the appropriate time — an NS1 test done on day 1 of symptoms is more useful than one done on day 7.

What to Eat and Drink During Dengue

There is no specific antiviral treatment for dengue. Management is supportive — keeping the patient hydrated, reducing fever, and monitoring for warning signs.

Hydration is the most important intervention:

• Water — continuously, even if thirst is absent
• ORS (oral rehydration solution) — particularly if vomiting has occurred
• Coconut water — natural electrolytes, easy to drink even when nauseated, particularly useful
• Fresh juice (pomegranate, mosambi) — provides vitamin C and some calories; diluted if very sweet
• Dal water (the thin water from boiled moong dal) — easily digestible, provides some protein and potassium
• Rice water (kanji) — easy to digest, some carbohydrate

Papaya leaf extract: widely recommended in India, and now supported by some evidence. Clinical trials show papaya leaf extract (prepared from raw fresh papaya leaves — typically blended and the juice strained) may speed platelet recovery. It's not a substitute for medical monitoring, but it's a reasonable adjunctive support for mild cases. Don't consume in very large amounts; the extract can cause nausea. Several commercial preparations are also available.

Light, easily digestible foods:

• Khichdi, plain rice with dal water
• Banana — provides potassium and is gentle on the stomach
• Plain curd
• Toast or plain biscuits when appetite starts returning

Avoid:

• Fried, spicy, or heavy food during the acute phase
• Alcohol — suppresses immune function and dehydrates
• Aspirin and ibuprofen — these NSAIDs inhibit platelet function and increase bleeding risk in dengue. Use paracetamol for fever and pain. This is important — aspirin and ibuprofen can worsen dengue bleeding complications.

When to Stay Home and When to Go to Hospital

Can be managed at home (with daily monitoring):

• Fever without warning signs
• Able to drink adequate fluids (at least 2 litres daily)
• Urinating at least 4–6 times daily (a sign of adequate hydration)
• No bleeding
• Platelet count above 50,000 and not rapidly falling
• Able to tolerate oral paracetamol

Go to the hospital immediately if:

• Any warning signs appear (listed above in the critical phase section)
• Cannot keep any fluids down
• Platelet count below 50,000, particularly if falling rapidly
• Any bleeding — gums, nose, urine, stool, vomit
• Severe abdominal pain
• Difficulty breathing
• Confusion, extreme restlessness
• Very cold or clammy hands and feet (early shock)
• No urine in 6+ hours (severe dehydration or kidney involvement)

Children, elderly people, pregnant women, and people with diabetes, kidney disease, or heart disease who develop dengue should be more conservatively managed — earlier hospitalisation is appropriate.

Prevention: The Most Effective Strategy

No specific dengue vaccine is widely available for general use in India. Prevention relies on:

Eliminating mosquito breeding sites:

• Empty, cover, or treat any container that holds water — coolers, flower pots, buckets, overhead tanks
• Change the water in flower pots weekly
• Cover water storage containers completely
• Clear clogged gutters
• The Aedes mosquito breeds in very small amounts of water — even a bottle cap

Personal protection:

• Apply mosquito repellent (DEET-containing for reliable protection)
• Wear full-sleeved clothing during the day in high-risk areas
• Use mosquito nets for daytime rest
• Keep windows screened or closed during peak dengue risk months

Community-level: fogging and larval control in residential areas during outbreaks.

Care at Prakash Hospital Noida

At Prakash Hospital Noida, our physicians provide dengue testing (NS1 antigen and antibody testing), platelet count monitoring, and hospitalisation with IV fluid management for severe dengue. During peak dengue season in Noida and Greater Noida, rapid testing and close monitoring ensure appropriate management for every patient.

Whether you live in Sector 18, Sector 62, Greater Noida West, or anywhere in the NCR, Prakash Hospital Noida is a trusted name for dengue fever management, fever evaluation, and general medicine in Noida.

To book a consultation, call the number.