Humans can usually tell the difference between about 10,000 different smells. But if they’ve got a bad cold, all that snot blocking their nose might stop them from being able to smell at all.

The cold and flu season is here, and it brings along with it a runny nose, sniffling, watery eyes, cough, congestion, and even fever. And the worst happens when you lie down and the mucus dries ...

A cold is typically milder than ... and possibly bad breath, according to Dr. Ren. To get immediate relief for a runny nose, Dr. Ren suggests first blowing your nose gently to clear excess mucus.

"I feel so bad ... cold has no cure, but symptoms should go away on their own, the CDC said. Both viral infections and allergic reactions affect the respiratory system, stuffing up your nose ...