(HealthDay News) -- If you have a fever of more than 100 degrees in addition to symptoms such as sore throat, nasty cough, and congestion, it's most likely the flu, says the U.S. National Institutes of Health (NIH). Colds rarely produce fevers.
Similarly, a headache usually signals the flu, as do extreme exhaustion and body aches and pains.
Sneezing and a stuffy nose, on the other hand, are more often signs of a cold, the NIH says.
These are only general guidelines. If you're unsure about what's ailing you, see your doctor.
