Allergic rhinitis, often called hay fever, mimics cold symptoms but isn’t caused by a virus or bacteria. Non-allergic rhinitis, triggered by irritants like smoke, strong odours, or weather changes, ...

As millions travel for the July 4th weekend, severe storms are moving across the Northeast, threatening to delay or cancel flights. Heavy rain, damaging winds, hail and lightning are possible.

Investigating the threat to the U.S., Diane Sawyer speaks with a young man convicted for providing support to ISIS.

ABC News’ Dr. Tara Narula shares what to look for when shopping for over-the-counter decongestants. Republicans disappear ...

Cardiologist Dr. Dmitry Yaranov warns that certain commonly used medications can silently harm the heart. These drugs may ...

Over-the-counter medications can have easily overlooked impacts on eye health if not used appropriately, according to a ...

A blocked nose may just be something innocuous, but some doctors claim it could also be a sign of some underlying health ...

A stuffy nose can be a real pain, but there are times it could be a sign of something more serious as some health experts ...

As millions of people across the UK gear up for summer holidays, important travel advice has been issued to anyone planning ...

While allergies affect people everywhere, some US cities are especially tough. The Asthma and Allergy Foundation has ranked ...