Blood problems refer to any medical condition that affects the blood, such as ANEMIA, clotting, and feuds. ANEMIA is a condition in which the body does not have enough healthy red blood cells to carry oxygen throughout the body. Clotting is a process in which blood cells form clumps or lumps, which can lead to blockages in the blood vessels. Feuds are disagreements between two or more people that can lead to a breakdown in communication and can cause stress on the body, which can lead to blood problems.