The main cause of bruising is the rupture of a blood vessel and its prolonged accumulation in a subcutaneous part of the body, which cannot be absorbed and disappeared due to normal blood circulation, where the blood vessels mainly refer to capillaries. Regularly produce bruises, or bruises without excessive injury, mainly consider the following two points: 1, the cause of capillary rupture bleeding, resulting in bruises can not be absorbed in time, the cause of the rupture of blood vessels may be various, the main can consider whether the vascular purpura, is the tissue around the blood vessels for some reason to change the original nature of the state, atrophy or relaxation are It may happen.2. The blood vessel is easily broken without strong injury, resulting in bleeding, after bleeding if the platelet content in the patient’s body is abnormal, or the coagulation mechanism in the patient’s body is hindered, it may cause bruising. The coagulation mechanism is mainly based on the level of clotting factors anticoagulant substances and fibrin dissolution to maintain the homeostasis of the body, and the level of these substances in the body will be checked during the general medical examination. Therefore, it is recommended that patients suffering from such diseases should have regular medical checkups on a regular basis, and if the bruising is serious, it is recommended that medical checkups be conducted in a timely manner.