The body bruises when touched indicates that the body appears subcutaneous bleeding, the body bruises when touched can be seen in a variety of reasons, common causes include: a, vitamin C deficiency, vitamin C deficiency patients due to capillary density decreased, increased permeability, in the case of a minor collision will lead to capillary rupture, blood leaking from the blood vessels to the outside of the blood vessels, resulting in subcutaneous bruising. Second, thrombocytopenia, no matter which cause of thrombocytopenia, will lead to a decrease in the body’s hemostatic function, in the case of a minor collision will also lead to capillary rupture bleeding, bleeding body bruising. Third, coagulation dysfunctional diseases, due to a variety of reasons resulting in a decrease in the activity of coagulation factors, the body itself has a tendency to bleed, when a minor collision will also cause the body to bruise, the most effective method is to supplement the treatment of coagulation factors.