The symptoms of purpura are as follows:
1. Simple purpura: the cause of the disease is unclear, generally mild, with no obvious changes in blood and blood vessels, and occasionally mild coagulation dysfunction.
2. Henoch-Schonlein Purpura
(2) Henoch-Schonlein Purpura: It often occurs due to the increase of permeability and brittleness of blood vessel wall, and the vascular system changes, but the blood itself does not change. Therefore, the number of platelets, clotting time and prothrombin time are all in the normal range. It is a kind of vascular allergic disease, because the body reacts to some allergens, which leads to the increase of capillary fragility and permeability, blood extravasation, skin, mucosa and some organs bleeding and other allergic manifestations.
(3) Idiopathic thrombocytopenic purpura, also known as hemorrhagic purpura, has unknown causes. However, antiplatelet factors can be found in the blood of some patients, which can reduce platelets and cause bleeding. It is a hemorrhagic disease with the destruction of platelet immunity and the decrease of blood platelets in circulating blood. It is characterized by extensive bleeding of skin mucosa and viscera, thrombocytopenia, normal or increased number of megakaryocytes in bone marrow with maturity disorder, shortened platelet life and positive anti-platelet antibodies. More common in children and young adults, women are more than men.