7 Warning Signs Of Dengue Fever
Know the 7 key warning signs of dengue fever, from high fever to severe headaches. Early detection is crucial for timely treatment and preventing serious health complications.
Written by Dr. J T Hema Pratima
Reviewed by Dr. Shaik Abdul Kalam MD (Physician)
Last updated on 23rd Jul, 2025
Introduction
Dengue fever is a viral illness spread by mosquitoes, primarily in tropical and subtropical regions. While many cases are mild, severe dengue (also known as dengue hemorrhagic fever) can be life-threatening if not treated promptly. Recognising the early warning signs can help you seek medical care in time and prevent complications.
In this article, we’ll discuss the 7 key warning signs of dengue fever, along with causes, prevention tips, and when to see a doctor.
What Causes Dengue Fever?
Dengue is caused by the dengue virus, which is transmitted through the bite of an infected Aedes mosquito (primarily Aedes aegypti). These mosquitoes are most active during the day, especially in the early morning and late afternoon.
The virus does not spread directly from person to person, but if a mosquito bites an infected person, it can transmit the virus to others.
7 Warning Signs of Dengue Fever
Dengue symptoms usually appear 4 to 10 days after being bitten by an infected mosquito. While some people experience mild flu-like symptoms, others may develop severe dengue, which requires immediate medical attention.
Here are 7 warning signs to watch out for:
1. High Fever (Sudden Onset)
A sudden high fever (104°F or 40°C) is one of the first signs of dengue.
The fever typically lasts 2 to 7 days.
Unlike common viral fevers, dengue fever often causes severe body pain, earning it the nickname "breakbone fever."
2. Severe Headache and Eye Pain
Intense headache, especially behind the eyes.
Pain worsens with eye movement.
Light sensitivity may also occur.
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3. Muscle and Joint Pain
Severe muscle pain (myalgia) and joint pain (arthralgia).
Pain is often felt in the back, legs, and shoulders.
4. Skin Rash
A red, spotty rash may appear 2 to 5 days after the fever starts.
The rash can spread across the face, arms, legs, and torso.
Some people also experience itchy skin.
5. Nausea, Vomiting, and Loss of Appetite
Persistent nausea and vomiting.
Loss of appetite, leading to weakness.
6. Mild Bleeding (Warning Sign of Severe Dengue)
Nosebleeds, bleeding gums, or easy bruising.
Small red spots under the skin (petechiae).
In severe cases, internal bleeding may occur.
7. Fatigue and Weakness
Extreme tiredness that lasts for weeks.
Some people experience post-dengue fatigue syndrome, where weakness persists even after recovery.
When to Seek Emergency Care?
Severe dengue (dengue hemorrhagic fever or dengue shock syndrome) is a medical emergency. Watch for these danger signs:
Severe abdominal pain
Persistent vomiting
Rapid breathing or difficulty breathing
Bleeding from nose or gums
Cold, clammy skin
Confusion or irritability
If you or a loved one experiences these symptoms, seek medical help immediately.
How Is Dengue Diagnosed?
Doctors diagnose dengue through:
Blood tests (to detect the virus or antibodies).
Platelet count check (low platelets are common in dengue).
If you suspect dengue, book a blood test through Apollo 24|7 for quick and accurate results.
Member priceHow to Manage Dengue Fever at Home?
There is no specific cure for dengue, but supportive care helps recovery:
Stay Hydrated: Drink plenty of fluids (water, coconut water, ORS).
Rest: Avoid physical strain.
Pain Relief: Use paracetamol (acetaminophen) for fever and pain. Avoid aspirin or ibuprofen, as they can increase bleeding risk.
Monitor Symptoms: Keep track of fever, hydration, and platelet levels.
Preventing Dengue Fever
Since there is no vaccine widely available for dengue, mosquito control is the best prevention method:
Use mosquito repellents (containing DEET, picaridin, or oil of lemon eucalyptus).
Wear long-sleeved clothing to reduce mosquito bites.
Use mosquito nets while sleeping.
Eliminate stagnant water (mosquitoes breed in standing water).
Keep surroundings clean: Cover water containers and clean flower pots regularly.
Conclusion
Dengue fever can range from mild to severe, so early detection is crucial. If you or someone you know experiences high fever with severe body pain, rash, or bleeding tendencies, consult a doctor immediately.
For quick diagnosis and expert care, you can book a consultation or lab test through Apollo 24|7. Stay informed, stay safe, and take preventive measures to protect yourself and your family from dengue.
Consult Top Specialists
Consult Top Specialists
Dr. Suraja Nutulapati
General Physician/ Internal Medicine Specialist
10 Years • MBBS, MD (Internal Medicine)
Hyderabad
Apollo 24|7 Clinic, Hyderabad
(850+ Patients)
Dr. Lakshmi Sanjitha Kakani
General Physician/ Internal Medicine Specialist
6 Years • MBBS, MD (General Medicine)
Visakhapatnam
Apollo 24|7 Clinic - Andhra Pradesh, Visakhapatnam
Dr Divya Lekha Gunta
General Practitioner
10 Years • MBBS, MD (Pathology)
Visakhapatnam
Apollo 24|7 Clinic - Andhra Pradesh, Visakhapatnam
Dr. Immanuel Raj
General Practitioner
8 Years • MBBS. MBA (HHSM)
Visakhapatnam
Apollo 24|7 Clinic - Andhra Pradesh, Visakhapatnam
Dr. Jawwad Mohammed Kaleem
General Practitioner
4 Years • MBBS
Hyderabad
Apollo 24|7 Clinic, Hyderabad
