— G.W.T.Dear G.W.T.: The sinus of the heart has nothing to do with your nose as you might guess; it's a structure in the ...

The sinus of the heart is a structure in the right atrium where blood flows into the heart from the venae cavae.

“Virginia’s humidity changes fast,” said Bane. “One day it’s damp and warm, the next it’s crisp and dry. That constant ...

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

At age 76, I was diagnosed with sinus node dysfunction last year after several episodes of what I’d call being “spaced out” ...

Hurricane Melissa is now a rare Category 5 storm as it closes in on a historic, catastrophic landfall in Jamaica Did ...

Hospitals across China are reporting a significant increase in respiratory cases among children, coinciding with the autumn-winter peak season for such illnesses. Recent national sentinel surveillance ...

Sinusitis is becoming increasingly common, causing pain and pressure around the nose, forehead, and eyes. Managing this ...

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.

A 42-year-old woman's Disney trip plans were derailed by flu-like symptoms, initially mistaken for a sinus infection. Despite ...

A 70-year-old man presented to Tufts emergency department with a 2-day history of left eye redness and periorbital swelling ...