In TODAY.com's Expert Tip of the Day, a doctor reveals the important clues about your health that can be found in your snot.

Many people suffer from sinusitis during seasonal changes, experiencing persistent nasal congestion and yellow mucus. The ...

Sinuses are interconnected, hollow spaces located in the skull that connect to the nasal passages. They help filter the air we breathe and act as another level of immune defense. Sinuses are lined ...

Dear Doctors: Can you please talk about sinusitis? I’ve been having headaches and postnasal drip for a few months, and I thought it was because of my allergies. But my brother, who is a nurse, thinks ...

Once leaves start to fall, many allergy sufferers think they’re in the clear. But damp leaf piles and yard debris can harbor ...

A sinus infection (sinusitis) is caused by a virus or (sometimes) bacteria that creates swelling in the nasal passages. Oftentimes, sinus infections come with or after a viral upper respiratory ...

DEAR MAYO CLINIC: I have had ongoing nasal congestion and mucus for the past several months. I thought it was allergies, but my doctor says I likely have acute sinusitis brought on by allergic ...

When allergies or a cold leave you sidelined with painful sinus pressure, you want a speedy fix. Fortunately, help is literally at your fingertips. By activating key sinus pressure relief points, you ...

The sinuses are four hollow spaces on both sides of your face and head. They're connected by narrow channels that allow air and fluids to flow between your nose and throat. If you have inflammation in ...

When, before I became a father, I saw my grandmother suck mucus out of the nostrils of babies I little realised that, some day, I, too, as a parent, would help relieve nasal congestion in my babies in ...

DEAR DOCTORS: I saw my dentist for pain in an upper molar, but the X-ray was normal. My nose was also plugged up, and she said it might be my sinuses. I started doing a saline rinse, and after a few ...

Q I saw my dentist for pain in an upper molar, but the X-ray was normal. My nose was also plugged up, and she said it might be my sinuses. I started doing a saline rinse, and after a few days the pain ...