Doctors use a combination of clinical evaluation, symptoms, and laboratory tests to identify dengue. Initially, the doctor will assess the patient's medical history and conduct a physical examination. They will look for common symptoms of dengue, such as high fever, severe headache, joint and muscle pain, rash, and other flu-like symptoms. To confirm the diagnosis, doctors order specific laboratory tests, including the NS1 antigen test, IgM antibody test, IgG antibody test, and PCR (Polymerase Chain Reaction) test. These tests detect dengue-specific markers in the blood, such as viral proteins (NS1), antibodies (IgM, IgG), or genetic material (PCR). By combining clinical findings with laboratory test results, doctors can accurately diagnose dengue and provide appropriate management and care for the patient. Early diagnosis and timely medical intervention are crucial for better outcomes in dengue cases.