A sudden fever, headache and body pain can look like a routine viral infection. But sometimes, those same symptoms can point todengue fever, especially in areas where mosquito-borne infections are common. Influenza can also cause sudden fever, body aches and fatigue, making the two illnesses easy to confuse in the first few days. The difference becomes more important when symptoms such as pain behind the eyes, rash, stomach problems or respiratory symptoms appear. Knowing these clues does not replace a medical test, but it can help you recognise when medical attention may be needed.
