The inexplicable bruising on the body can often be seen in trauma, in the case of unnoticed minor bruises, resulting in local capillary rupture, skin bruising phenomenon, you can apply local hot compresses to promote blood circulation or apply some blood circulation drugs to relieve. Excluding traumatic factors body bruises for no reason should consider platelet abnormalities, abnormal blood vessel walls and coagulation abnormalities related diseases: 1, platelet abnormalities: seen in thrombocytopenic purpura, aplastic anemia, leukemia, hypersplenism and various congenital or acquired platelet quality abnormalities, serious infections and taking myelopoietic inhibitory drugs can also cause platelet abnormalities. Platelets assist in maintaining the integrity of the blood vessel wall and participate in the coagulation and hemostasis process. Abnormal platelet quantity or quality may manifest as bleeding under the skin and mucous membranes, bruising, platelet supplementation or application of pro-platelet production drugs, and if necessary, plasma replacement, blood transfusion, hematopoietic stem cell transplantation and other therapeutic methods; 2. Abnormalities of the blood vessel wall: such as hereditary bleeding capillary dilatation, allergic purpura, drug purpura, etc. There may also be physiological capillary fragility increase, which can be seen in some female population as well as the elderly. It can be treated by eliminating allergic factors, avoiding strenuous exercise, without special treatment due to physiological factors or appropriate vitamin supplementation, and pathology often requires the use of antihistamines or hemostatic drugs that constrict blood vessels under the guidance of a doctor; 3. etc., coagulation dysfunction is prone to subcutaneous bleeding, causing bruising performance, it is recommended to go to the hospital for routine blood and coagulation tests, etc., which can be supplemented with relevant coagulation factors, application of hemostatic drugs, or immunotherapy, etc.