How many types of purpura are there

Nowadays, skin diseases are very common, and they have a huge impact on people. Purpura is a relatively complicated skin disease. When purpura occurs, a large number of red spots will appear on the patient's body, which will then slowly develop into bruises and the range will continue to expand. There are many types of purpura and the specific treatments are also different. So, how many types of purpura are there?

1. Classification of Purpura

1. Simple purpura

Generally there are no systemic symptoms, but scattered bright red bruises the size of a needle tip may appear on both lower limbs, which do not fade when pressed. After seven days, the color gradually fades and disappears. But new petechiae appear.

2. Idiopathic thrombocytopenic purpura

It can be divided into acute and chronic types. The acute type is less common and can occur in children, often with a history of infection before the onset of the disease. The disease is characterized by sudden onset, fever, extensive skin bleeding, large ecchymoses and hematomas, mucosal and urogenital bleeding, and a significant decrease in platelets, which may be less than 5,000/mm3. The chronic type is more common, more common in young women, with a slow onset and persistent or recurrent bleeding. It occurs not only on the skin, but also on the mucous membranes or internal organs.

Rheumatic purpura

Slightly raised rice-grain-sized ecchymoses appear on both lower limbs, and petechiae, wheals, or edematous erythema may also appear. At the same time, there may be swollen and painful joints, as well as systemic symptoms such as fever and weakness in the limbs.

4. Abdominal purpura

Skin manifestations are similar to those of rheumatic purpura, but may include abdominal pain, vomiting, diarrhea, tenesmus, bloody stools, and in severe cases, intussusception

2. The difference between Henoch-Schonlein purpura and thrombocytopenic purpura

1. Allergic purpura may be preceded by upper respiratory tract infection or taking certain medications, foods, and other triggers. Purpura is often seen on the extensor side of the lower limbs, buttocks, and around the joints. It is bright red to dark red papules, erythema or urticaria that are raised above the skin. They vary in size, are mostly symmetrical, appear in batches, and do not fade when pressed. It may be accompanied by gastrointestinal symptoms such as abdominal pain, vomiting, bloody stools, migratory swelling and pain in large joints, hematuria, proteinuria, etc. Platelet count, bleeding and clotting time, and clot retraction time were all normal. Attention should be paid to regular urine routine examinations, as microscopic hematuria and proteinuria are often found.

2. Thrombocytopenic purpura may cause petechiae and ecchymoses on the skin and mucous membranes. The petechiae are mostly needle-sized, usually not protruding above the skin surface, and are mostly asymmetrical. They can be found all over the body, but are more common on the limbs, head and face. It may be accompanied by epistaxis, bleeding from the teeth, hematuria, bloody stool, etc. In severe cases, intracranial hemorrhage may occur. The platelet count is significantly reduced, the acute type is generally lower than 20 times 109 times/L, and the chronic type is generally between 30x109 times/L-80X109 times/L. Bleeding time is prolonged, blood clot retraction is poor, and the clot test is positive.