Some patients inexplicably appear on the skin blue piece, purple piece, folk people called ghost pinch green, this is superstition. Medically called purpura, this is a common disease, the essence of the body coagulation and hemostatic function is impaired, resulting in subcutaneous bleeding. According to the director of hematology Liao Hui, many patients with coagulation dysfunction have no major problems in their daily life, but after trauma surgery, after injection and infusion, they will have more than one symptom of blood oozing. Severe epistaxis, gum bleeding, gastrointestinal bleeding, hematuria may even occur, and excessive bleeding may cause anemia. Repeated bleeding from the joint cavity is seen in patients with severe disease, mostly after minor injuries, and may also bleed spontaneously. Main causes 1. Abnormal function of blood vessel wall Due to genetic factors, serious infection or lack of vitamin C, the brittleness of capillaries increases and capillaries will rupture when the skin is slightly bumped or rubbed, resulting in purpura or petechiae under the skin. 2, the number of platelets is abnormal platelets are known as “engineering soldiers”, any part of the body due to trauma and bleeding, it will be there to stop bleeding, so as to avoid damage to the body. If the number of platelets is reduced or their function is low, spontaneous petechiae will appear on the skin, often accompanied by abnormalities such as hemoptysis, blood in the stool, blood in the urine or excessive menstruation. 3, abnormal coagulation function When suffering from hemophilia or vitamin K deficiency, the skin will also often appear purpura, and once bleeding occurs, it is difficult to stop. If you have this disease, do not panic, you should immediately ask your doctor to identify the cause of the disease and prescribe the right medicine to restore your health. A typical case of coagulation disorder Patient Liu, a chef, came to our urology department to see a doctor with a large area of blue and purple petechiae on his legs. The patient himself was unaware of his coagulation disorder and was sent to our hematology department for treatment after the bleeding occurred after the injection. Coagulation disorders are bleeding disorders caused by the lack or abnormal function of coagulation factors, and can be divided into two categories: hereditary and acquired. Hereditary coagulation dysfunction is generally a single coagulation factor deficiency, mostly in infancy and early childhood, there are bleeding symptoms, mainly often family history; acquired coagulation dysfunction is more common, rehabilitation patients often have a variety of coagulation factor deficiencies, mostly occur in adulthood, clinical signs and symptoms of the original disease in addition to bleeding.