The actual fact is that you can find a lot of people who are not sure of the reason for the bruising of the limbs and trunk, which often brings a lot of psychological stress to the women, but when you go to the hospital to check the blood and coagulation routine, there are no abnormal findings, it is likely that you are suffering from a disease called simple purpura. Simple purpura is a bleeding disease, common in women of childbearing age, the onset is related to changes in the concentration of estrogen in the body, that is, there is no obvious history of trauma, appearing bruises on the limbs or trunk area, patients sometimes go to the hospital to repeatedly do routine blood and coagulation tests for the bruises on the body, usually need to take oral vitamin C treatment, the effect is good. In addition to simple purpura, other diseases including thrombocytopenic purpura and other coagulation system diseases may also present with bruising on the body, but these diseases can often be diagnosed through routine blood tests and coagulation routine tests.