When we lie flat on our back to sleep, gravity causes an increase in blood flow to our nose. That's why there's this instant relief when we stand up in the morning. Then there's the nasal cycle.

People with the highest level of the sugar substitute erythritol in their blood were shown to have twice the risk for stroke, blood clot or death compared with those with the lowest level.

Random nosebleeds are like something out of a horror movie. Here's why your nose might start gushing blood out of nowhere.

Two drugs are not always better than one when it comes to using blood thinners to treat clogged arteries in the legs, U.S. researchers reported on Wednesday.

NORTH PHILADELPHIA (WPVI) -- A blood clot in the legs or pelvis is serious enough. However, it can also lead to another condition that threatens the lungs and heart called CTEPH. For one CTEPH ...