Your Cold and Flu Symptoms, Explained

The Symptom: Sneezing 

What it means: Your body is expelling bacteria and other particles with a sudden, involuntary burst of air. Don’t suppress a sneeze, as your body is trying to evict the irritants.

When to worry: Almost never, but if sneezing interferes with your life or persists after other symptoms are gone, talk to your doctor to find out if an allergy might be the cause.