How do you know if you have flu symptoms or cold symptoms, and how to tell the difference? Flu symptoms and cold symptoms often mimic one another: both can have nasal congestion, cough, body aches, headaches and malaise. A common cold, however, rarely has symptoms of fever above 100 degrees. With flu symptoms, you will probably have a fever initially with the flu virus and you will feel miserable. Body and muscle aches are also ...