Dengue Season: Dengue vs Viral Fever – Know the Difference
By Dr. Ashok Kumar, General Physician & Diabetologist, MedUnited Hospitals, Amalapuram When fever appears during the monsoon, one of the first questions many families ask is: “Is this just a viral fever, or could it be dengue?” The two can look similar in the early stages. Fever, headache, body aches, tiredness and nausea may occur with several infections, which is why trying to identify the illness based only on symptoms can be misleading. Dengue deserves particular attention because some patients can develop severe disease, especially around the time the fever starts coming down. Early medical assessment, appropriate testing and careful monitoring can make an important difference. As a General Physician, my advice to patients during dengue season is simple: do not panic about every fever, but do not ignore a persistent or worsening fever either. Why Dengue Becomes a Bigger Concern During the Monsoon Dengue is a viral infection transmitted primarily through the bite of infected Aedes mosquitoes. These mosquitoes are particularly active during the daytime and can breed in relatively small collections of stagnant water around homes and communities. Rainfall, humidity and suitable temperatures can create favourable conditions for mosquito breeding and dengue transmission. WHO notes that dengue transmission often peaks during and after rainy seasons in many settings. This makes monsoon and post-monsoon periods an important time for families in tropical and subtropical regions to be more vigilant. Dengue Fever vs Viral Fever: Why It Can Be Difficult to Tell “Viral fever” is a broad term rather than one specific disease. Many viruses can cause fever and flu-like symptoms. Dengue is also a viral infection, but it is caused specifically by the dengue virus and transmitted by infected mosquitoes. In the early phase, dengue may resemble other viral illnesses. Common dengue symptoms include: Symptoms commonly begin around 4-10 days after infection and may last several days. Therefore, a patient should not assume that every fever is dengue, but neither should dengue be ruled out simply because the symptoms initially look like a common viral infection. Can Symptoms Alone Confirm Dengue? No. A doctor considers the patient’s symptoms, examination findings, illness timeline, local disease patterns and appropriate laboratory investigations. Depending on the stage of illness, different dengue tests may be useful. Laboratory diagnosis can involve antigen detection, molecular tests or antibody-based testing, with the choice depending on when the patient presents and the available testing facilities. This is one reason self-diagnosis based on symptoms, social-media posts or advice from friends can be risky. What About Platelet Counts? Platelets are one of the most misunderstood aspects of dengue. Many families become extremely anxious as soon as they see a falling platelet count. However, a platelet count should not be interpreted in isolation. Doctors assess the overall clinical condition along with platelet count, haematocrit, bleeding, hydration status, urine output, blood pressure and other relevant findings. A falling platelet count can occur during dengue, but the number alone does not determine whether a patient has severe dengue or whether platelet transfusion is required. WHO guidance specifically notes that prophylactic platelet transfusion is not routinely indicated simply because platelet counts are low; transfusion decisions depend on the patient’s clinical condition and bleeding or other indications. An important message for families “Don’t treat the platelet number. Treat the patient.” If a family member has dengue, follow the monitoring plan given by the treating doctor rather than repeatedly checking platelet counts without medical guidance. When Does Dengue Become Dangerous? One of the most important facts about dengue is that a patient may develop warning signs around the time the fever decreases. A reduction in fever does not automatically mean that the danger has passed. The critical phase can occur approximately 3-7 days after the onset of illness. Seek urgent medical attention if a patient develops: These warning signs can indicate progression toward severe dengue and require prompt medical evaluation. What Should You Do If You Suspect Dengue? If you or your child develops a significant fever during dengue season: Consult a doctor Do not rely only on home remedies or internet searches to determine the cause of fever. Follow the recommended testing schedule The appropriate test can depend on how many days the patient has had symptoms. Maintain adequate hydration Fluids are an important part of supportive care. Your doctor may advise an appropriate fluid intake based on the patient’s age, symptoms and medical condition. Use medicines only as advised Paracetamol may be used for fever and pain when appropriate. Aspirin and NSAIDs such as ibuprofen should generally be avoided when dengue is suspected because of the potential increased risk of bleeding. Do not start antibiotics or other medicines on your own unless prescribed. Monitor the patient, not just the thermometer Pay attention to alertness, hydration, urine output, bleeding, abdominal symptoms, breathing and overall condition. This is particularly important for children, older adults, pregnant women and people with conditions such as diabetes, kidney disease or other chronic illnesses. What About Children and Dengue? Children can also develop dengue and parents may sometimes mistake the early symptoms for a routine viral infection. Watch for: Children can become dehydrated more quickly, so parents should seek medical advice rather than depending solely on home treatment. Dengue Prevention Starts at Home Treatment is only one part of dengue control. Prevention begins with reducing mosquito breeding and avoiding mosquito bites. Around the house: WHO recommends eliminating water-holding breeding sites and taking measures to prevent mosquito bites. Because Aedes mosquitoes are day-biting mosquitoes, protection should not be limited only to nighttime. A Dengue Patient Can Also Help Prevent Further Spread A person infected with dengue can infect mosquitoes that bite them during the period when the virus is circulating in their blood. Those mosquitoes can subsequently transmit dengue to other people. Therefore, a person with suspected or confirmed dengue should also take measures to avoid mosquito bites, including during the daytime. This is particularly important in households, schools and workplaces. Dengue: Some Common Myths Myth: “Every fever during monsoon is