The causes of bleeding in the organism mainly include the following aspects: the first aspect is considered to be caused by abnormalities in the coagulation function of the organism, including the lack of certain coagulation factors in the coagulation system or due to dysfunctions of the immune system of the organism, including splenomegaly, hypersplenism and so on, which lead to excessive destruction of platelets and cause thrombocytopenia leading to bleeding in the organism, and abnormalities in coagulation function of the organism also lead to localized bleeding caused by rupture of microvessels; the second aspect. Consider the immune system diseases such as allergic purpura, etc., caused by the body’s blood vessel expansion caused by local bleeding. Bleeding on the body need to pay attention to the hematology department of the hospital in a timely manner, check the blood routine and coagulation system examination, to further clarify the causes of bleeding after symptomatic treatment.