Subcutaneous hemorrhage can be classified according to the etiology, which is mainly divided into three categories, including physiological, pathologic, and pharmacologic. 1. Physiological subcutaneous hemorrhage: physiological subcutaneous hemorrhage is mainly caused by unintentional bumps in life. 2. Pathological subcutaneous hemorrhage: pathological subcutaneous hemorrhage is mainly caused by serious infections, cirrhosis, liver failure, aplastic anemia, multiple myeloma, acute leukemia and other reasons. 3. Pharmacological subcutaneous hemorrhage: certain drugs may affect the normal coagulation function, thus causing subcutaneous hemorrhage, such as cilostazol, tegretol, aspirin, clopidogrel, warfarin, rivaroxaban and so on. When there are symptoms of subcutaneous bleeding, you should consult a doctor for examination in order to clarify the cause of the disease and actively take appropriate measures to deal with it.