Bruising on girls’ bodies can be caused by trauma, thrombocytopenic purpura, aplastic anemia and other diseases. 1. trauma: trauma is the body due to the external object of the external damage caused by the blow, collision, etc., if the girl is often traumatized, it will be easy to have bruises, is due to the subcutaneous capillary damage caused. 2. Thrombocytopenic purpura: the cause of thrombocytopenic purpura is not yet clear, with the body’s immune system disorders, heredity and other factors related to the main manifestations of the skin and mucous membrane petechiae ecchymosis. If a girl suffers from thrombocytopenic purpura, it will lead to thrombocytopenia and easy bruising. 3. Aplastic anemia: girls easy to have bruises may also be caused by aplastic anemia, the causes include viral infections, chemical drugs, radiation and so on. The main manifestations of anemia, bleeding and infection, of which bleeding is concentrated in the skin bleeding spots, petechiae, and so on. There are more reasons for girls to bruise easily, and it may also be caused by hemophilia, etc. It is recommended to consult a doctor for a clear diagnosis.