Removing stagnant water and covering storage containers are practical dengue-prevention steps.
Dengue is a mosquito-borne viral illness reported across India. Knowing the usual symptoms, recognizing warning signs early and reducing mosquito breeding sites can help families respond promptly. This guide summarizes information published by India’s National Centre for Vector Borne Diseases Control (NCVBDC), under the Ministry of Health and Family Welfare.
How dengue spreads
Dengue spreads through the bite of an infected Aedes mosquito. These mosquitoes commonly breed in water collected or stored in household containers, including coolers, buckets, pots, tanks, tyres and discarded items. NCVBDC notes that the dengue-carrying mosquito bites during the day and can breed in containers holding even a small amount of water.
Common dengue symptoms
Symptoms can begin several days after an infected mosquito bite. NCVBDC lists these common signs:
- A sudden high fever
- Severe headache, especially in the forehead
- Pain behind the eyes, which may worsen with eye movement
- Muscle and joint pain
- Nausea or vomiting, and reduced appetite
- A measles-like rash, often over the chest and upper limbs
These symptoms can have other causes too. A symptom list cannot confirm dengue; a health professional must assess a suspected case.
Dengue warning signs: seek urgent medical care
NCVBDC’s 2023 National Guidelines for Clinical Management of Dengue Fever identify warning signs that require prompt medical assessment. Do not wait for every sign to appear. Seek urgent care if a person with possible dengue develops:
- Severe or persistent abdominal pain
- Repeated or persistent vomiting
- Bleeding from the nose or gums, blood in vomit, or black, tarry stools
- Red spots or patches on the skin, or other unusual bleeding
- Unusual drowsiness, sleepiness, irritability or restlessness
- Pale, cold or clammy skin
- Difficulty breathing
- Marked thirst or a very dry mouth, or a rapid, weak pulse
These can be signs of severe dengue. Contact emergency medical services or go to the nearest hospital immediately if breathing is difficult, there is significant bleeding, the person is unusually drowsy or unresponsive, or their condition is rapidly worsening. The fever settling does not by itself rule out danger; the guideline notes that the critical phase may begin around the time the fever falls.
Practical dengue prevention at home
- At least once a week, empty and clean coolers and other small water-holding containers; do not leave water standing in them.
- Keep water-storage drums, tanks and other containers tightly covered.
- Remove or dispose of items that collect rainwater, such as discarded cups, tins and tyres; check plant saucers, flower vases and roof gutters.
- Use window and door screens where possible. Wear clothing that covers arms and legs, and use mosquito nets or repellents when resting or sleeping during the day, following product instructions.
- Check indoor and outdoor areas regularly, including dark corners and places where water may collect.
Because the mosquito can breed in small amounts of water, household checks and community-level removal of breeding sites both matter.
When to contact a doctor
NCVBDC advises that a person suspected of having dengue symptoms should see a doctor promptly for assessment. Seek care sooner for young children, older adults, pregnant people, or anyone with a serious existing health condition, and follow the clinician’s advice. If warning signs appear, treat it as urgent and go to a hospital.
Official information
- NCVBDC: Signs and symptoms of dengue fever
- NCVBDC: Dengue prevention — do’s and don’ts
- NCVBDC/MoHFW: National Guidelines for Clinical Management of Dengue Fever (2023)
Medical disclaimer: This article is for general awareness only and is not medical advice, diagnosis or a treatment plan. Dengue symptoms and severity vary. Do not use this article to self-diagnose or delay care. For symptoms or concerns, contact a qualified health professional; for warning signs or rapid deterioration, seek emergency care immediately.
Editorial note: Prepared from the official NCVBDC/MoHFW material linked above. The wording is original; no individual treatment or medication instructions are provided.