The main causes of bruised lumps on the body include trauma, blood disorders, and drug reactions. It is recommended to go to the hospital for examination to determine the specific cause of the disease and treat the cause. 1. Trauma: due to external trauma, the capillaries on the surface of the skin rupture, resulting in subcutaneous bruising and bruises. 2. Blood diseases: when suffering from thrombocytopenic purpura and other blood diseases, because of the abnormal coagulation function, the bleeding is not easy to coagulate, forming bruises on the body. 3. Drug reaction: when people take certain drugs that have anticoagulant effect on blood (such as Favalin, aspirin, etc.), it may cause abnormal coagulation function, and bruises appear on the surface of the skin. After excluding traumatic factors, if there are always bruises on the body, you should consult a doctor in time.