Doctors across Mumbai are urging people not to brush off fever, body ache and headache as “just monsoon flu,” warning that dengue can mimic ordinary viral infections in the first two to three days, when quick lab testing makes the biggest difference.

The symptoms doctors say you shouldn’t ignore

Dr. Ashwini Kumar Singh, Consulting Pathologist and Lab Director at NM Medical, reveals how seriously dengue should be treated right now. “Dengue fever is still a serious problem during the monsoon season. Do not ignore symptoms like a high fever, severe headaches, pain behind the eyes, muscle aches and joint pains, nausea, vomiting, and a rash. Although there is no antiviral drug to cure this disease, diagnosis, prevention, and proper treatment are important factors,” he said.According to Dr. Singh symptoms typically show up four to ten days after a person is bitten by an infected mosquito, and the list is fairly specific, high fever, severe headaches, pain behind the eyes, muscle aches and joint pains, nausea, vomiting, and a rash. And here’s the part that catches people off guard: most cases don’t look dangerous at all in the beginning. But about one in twenty cases can turn into a severe infection, which becomes a genuine medical emergency. That shift, when it happens, tends to occur within 24 to 48 hours after the fever starts coming down, not while the fever is at its peak. So the days right after you start feeling “better” are actually the ones doctors want you watching most closely, keeping an eye out for persistent vomiting, severe stomach pains, unusual bleeding, breathing difficulties, excessive fatigue, and restlessness.

Testing matters more than platelet panic, doctors say

Dr. Ajay Shah, Managing Director of Neuberg Ajay Shah Laboratory in Mumbai, framed the city’s dengue response around one core idea. “The approach to dengue preparedness in Mumbai has to be geared towards prompt diagnosis, proper clinical assessment, and good monitoring. The test for NS1 antigen and dengue antibody is used to confirm the presence of infection, based on the stage of the disease. More attention needs to be paid to fluid intake, signs of danger and seeking appropriate medical help, if needed, rather than being needlessly concerned about platelet levels,” he said.That last point is one doctors keep repeating this season, because platelet counts have become something of a public obsession every monsoon, often overshadowing the actual warning signs that matter more. Dr. Shah pointed out that lab tests like NS1 antigen, PCR, and dengue antibody testing can confirm an infection depending on which stage of the disease a patient is in, meaning the right test at the right time carries more weight than watching a single number spiral in your head. As for treatment, there’s still no antiviral drug for dengue. Care stays supportive — bed rest, hydration, and paracetamol to manage fever. Doctors are firm about steering clear of aspirin, ibuprofen, naproxen and other NSAIDs, since these can raise the risk of bleeding in dengue patients.

Why fever season causes so much confusion

So why does this keep tripping people up every year? Dr. Bharesh Dedhia, Consultant in Intensive Care at P. D. Hinduja Hospital and MRC, Khar, explained that fever with body ache and headache is one of the most common reasons people end up at a doctor’s clinic once the monsoon sets in. “Fever accompanied by body ache and headache is among the most common reasons for medical consultations during the monsoon season. Even when most of them are due to self-limiting viral conditions, there are instances where these same symptoms might herald an early case of dengue, thus requiring a rapid diagnosis of the condition,” he said.According to Dr. Dedhia, the real giveaway is in how intensely the symptoms show up. Dengue tends to bring a fast, high fever alongside severe headache, often with pain around the eyes, known as retro-orbital pain, plus intense muscle and joint pain and heavy fatigue. Nausea, vomiting, rashes, and occasionally minor bleeding like a nosebleed or bleeding gums can show up too. Ordinary viral fevers, in contrast, usually come with respiratory symptoms instead — sore throat, cough, sneezing, or a runny nose.

Where the lab comes in

But here’s the tricky part: in the first 24 to 72 hours, dengue and viral fever can look almost identical from the outside. Dr. Dedhia said this is exactly where lab testing becomes essential — NS1 antigen tests work well early in the infection, while IgM antibody tests become more useful later on. A complete blood count can also flag warning signs, including low platelets, leukopenia, and elevated hematocrit, which together can point toward plasma leakage in more severe dengue cases.His advice for when to actually go see a doctor is fairly direct, if fever hasn’t broken after two to three days, or if there’s worsening stomach pain, continuous vomiting, any bleeding, dizziness, or unusual fatigue, that’s the point to stop waiting it out at home. Catching dengue early doesn’t just rule out other viral illnesses, it also means doctors can track how the infection is progressing and step in before complications set in.