Clinically, there are four types of blood groups: a, b, ab, and o. These are mainly based on the type of antigenic antibodies in the body. They are mainly differentiated according to the type of antigen and antibody in people’s bodies. Different blood types are different from each other when it comes to blood transfusion. It is important to take care of your body and eat foods that are good for your blood and energy to help prevent anemia. If the patient appears to be dizzy and pale, he must go to the hospital for relevant blood tests in time.