Over time, what may have started out as an “itsy bitsy” spider vein can become a real concern. We call them “spider veins” because of their web-like appearance, but really they’re broken blood vessels ...

Whenever you see blood outside your body, it looks red. Why? Human blood is red because of the protein hemoglobin, which contains a red-colored compound called heme that’s crucial for carrying oxygen ...

In a first-of-its-kind operation in the United States, a team of doctors created a bioengineered blood vessel and implanted it into the arm of a patient with end-stage kidney disease. The procedure, ...

Bleeding, skin ulcerations or pain, as well as redness and swelling in a leg, are symptoms that should prompt a medical ...

Portal vein thrombosis means that there is a blood clot in the portal vein. This vein carries blood to the liver. A clot can fully or partially block the portal vein, as well as blood flow to the ...

Why do head injuries bleed so much? Learn the surprising reason behind all that blood and when it’s time to seek medical help.

Scientists built a vein made entirely of human tissue for a 10-year-old girl. June 13, 2012 — -- Scientists in Sweden are reporting a medical first: a vein grown in a lab for a 10-year-old girl ...

Portal vein thrombosis (PVT) is a blood clot of the portal vein, also known as the hepatic portal vein. A PVT blocks the blood flow from the intestines to the liver. Although it is treatable, PVT can ...