Usually, hemolysis occurs regardless of the blood type, because hemolysis is the process of excessive destruction of red blood cells in the peripheral blood with a shortened life span. If the rate of red blood cell destruction exceeds the compensatory function of the bone marrow, the patient will also develop anemia, called hemolytic anemia. Regardless of the blood type, hemolytic anemia can occur under certain conditions, such as the four blood types in the ABO system, including blood type A, B, O, and AB. Hemolytic anemia can occur if autoimmune hemolytic anemia occurs, which means that anti-red blood cell autoantibodies are produced. Also under certain external factors, such as infections, drugs, etc., hemolysis can be caused, regardless of the blood type. There is also a situation where hemolysis can occur under the action of certain toxins, such as snake venom, regardless of the blood type.