The bruising on girls may be caused by physiological or pathological factors, which should be judged according to the patient’s symptoms, blood routine, coagulation function and other examination results, and further clarify the cause and symptomatic treatment. Physiological factors: 1, in the menstrual period: when girls are in the menstrual period, hormone levels rise, resulting in increased capillary brittleness, which may cause bruising on girls for no reason; 2, vascular brittleness: when the vascular brittleness itself is large, it will also cause bruising on the body for no reason. About the above factors, if the test results are normal, there is no need to deal with, if the test results show abnormal, need to identify the causes, timely treatment. Pathological factors: 1, lack of vitamin: vitamin C can effectively maintain the elasticity of the blood vessel wall, vitamin K is the liver synthesis of coagulation factors necessary substances, in the lack of girls may appear bruises for no reason, accompanied by fatigue, weakness, repeated gum bleeding and other symptoms. The treatment of vitamin C or vitamin K can be done under the guidance of a doctor, and also appropriate food rich in vitamin C and vitamin K, such as citrus, kiwi, hawthorn, etc.; 2, disease factors: such as suffering from thrombocytopenic purpura, aplastic anemia, hemophilia, myelodysplasia and other diseases, resulting in a decrease in blood clotting substances, can also cause bruising on girls for no reason. Need to timely examination such as coagulation four, clear cause, timely cause-specific medication; 3, drug factors: mainly due to drugs lead to the body’s blood clotting substances reduced, such as long-term use of aspirin anticoagulation, can also lead to this situation. It is necessary to judge whether it is necessary to stop the drug or change the drug for treatment according to the examination results and bleeding situation; 4, other pathological factors: if you suffer from serious liver function damage, the liver can not synthesize sufficient amount of clotting factors in time, resulting in bruises on the body for no reason, you need to carry out liver protection treatment while replenishing clotting factors during treatment, and pay attention to more rest and avoid straining and staying up late. In addition, if primary thrombocytopenia is the cause, glucocorticoid therapy can be applied under the guidance of a doctor. For patients with particularly low platelets and a risk of bleeding, intravenous gammaglobulin infusion therapy can be chosen, and if necessary, cyclophosphamide or hematopoietic stem cell transplantation therapy can also be used. For patients with abnormal platelet function, if bleeding symptoms occur, they can be treated with intravenous platelet suspension under the guidance of a doctor.