Purpura is a bleeding tendency manifested by various factors that cause subcutaneous bleeding spots, such as a decrease in the number of platelets in the blood, lack or abnormal function of clotting factors, and abnormal blood vessels, which cause blood to leak out of the vessel walls and enter the skin or subcutaneous tissue causing damage. So purpura is a type of subcutaneous bleeding, and there is no essential difference between the two. The color of purpura depends on the amount of bleeding, the depth of the bleeding site, and the time after bleeding. The initial bleeding in superficial areas is usually bright red or dark red, while the color of bleeding in deeper areas is usually greenish-purple, which can manifest as dark purple, brown, brownish-yellow, etc. with time. Purpura is mostly distributed in the distal extremities, buttocks and other parts of the body, and is less common in the trunk area, and is sometimes seen in the skin around the ankles, calves, knees and elbows. If purpura continues to increase without remission and is accompanied by disorders of consciousness and severe bleeding, immediate medical attention is required. The first treatment is blood transfusion to replenish the blood components in the body quickly to help stop the bleeding and maintain life; secondly, rehydration treatment, using a large amount of saline rapid intravenous drip to replenish the blood volume; finally, hemostatic treatment, which can avoid the loss of blood, commonly used drugs such as tranexamic acid and posterior pituitary gland. If the patient’s symptoms are mild, no treatment may be given, but close observation is required, and the patient should go to the hospital for examination and treatment when the symptoms worsen.