Kim Hee Sun revealed that she suffers from anemia.

On December 17th's 'Healing Camp', MC Lee Kyung Kyu asked, "I heard you regularly get blood transplants. Is it true?"

Kim Hee Sun admitted, "I really need the blood. I get relaxed that way. It's like Song Kang Ho from 'Thirst'. I got a transfusion in July as well," surprising those on set.

The actress continued, "I suffer from anemia, but it's okay [as long as I] get blood transfusions. The red blood cells need to be an oval shape, so they can go through the blood vessels, but mine turn triangular when they pass the spleen. The red blood cells that make blood break apart, and I need more. If I get really tired, I get one every  6 months, and when I'm taking a break, I get one every 2 years. Each pack is 400 cc (13.5 fl. oz), and I get four so it adds up to 1,600 cc (54 fl. oz) of blood."