You may notice a lump in your neck ... That part is called the marrow, and it’s where your red blood cells and white blood cells are made. Your doctor may need to find out if a disease is ...

One of the blood tests showed that his red blood cells are too big. The nurse said it happens when you drink too much. What causes that? Is it dangerous? Unless it is quite severe, macrocytosis ...

Red blood cells carry oxygen from the lungs to every other organ, and blood-forming stem cells must make about 200 billion new red blood cells each day to keep the oxygen flowing. For many years, ...