Red blood cells transport oxygen throughout your body, including to vital organs and tissues. They also help your body get rid of carbon dioxide. Too little or too many red blood cells may be ...

If you’re feeling worn out or have suddenly lost some weight, your doctor might send you for a blood test. Blood tests are a common way health-care professionals detect, diagnose, and monitor a range ...

Blood clots in the legs are more common and more dangerous than many people realize. This condition, called venous thrombosis, happens when blood thickens and forms a blockage inside a vein, usually ...