Purple bruises on the body are caused by the rupture of capillaries under the skin and bleeding, which generally occurs after the body collides with a hard object. In most cases, this kind of bruise can be slowly absorbed by the body gradually and disappear. However, if many similar bruises appear on the body for no reason without any collision, it is important to be on high alert for blood problems, most commonly coagulation disorders. It is possible that the cirrhosis of the liver caused by abnormal coagulation mechanism, but also some hereditary diseases, such as hemophilia, and may be leukemia, aplastic anemia, may lead to the emergence of this situation. In addition, for some long-term use of heart disease drugs for the elderly, there may also be this situation, such as taking aspirin, warfarin, clopidogrel a class of drugs to treat cardiovascular disease, long-term use of such drugs, may also lead to abnormal coagulation function.