Purpura, also known as purpura, is a common bleeding disorder in pediatric patients, in which blood spills under the skin and mucous membranes, appearing as petechiae and not fading when pressed. Allergic purpura, also known as Hen-Schu syndrome, is a systemic vasculitis with small vasculitis as the main lesion. The main manifestation is skin purpura, often accompanied by joint swelling and pain, abdominal pain, blood in stool, hematuria and proteinuria. It occurs mostly in children aged 2-8 years old, more in boys than in girls, with the majority of cases occurring in spring and autumn. The cause of allergic purpura is not yet clear, although it may be related to allergy caused by food (eggs, dairy, beans, etc.), drugs, microorganisms, pollen, insect bites, vaccinations, anesthesia, etc., but the exact cause of allergy is often difficult to determine. Children with this disease often have a history of upper respiratory tract infection one to three weeks prior to the onset of the disease, which may be accompanied by systemic symptoms such as low fever, loss of appetite, and malaise. Generally acute onset, different combinations of manifestations, appearing in different sequences. 1, skin purpura: manifested as skin petechiae, mostly around the joints of lower limbs and buttocks, purpura is symmetrically distributed, appearing in batches, varying in size and color, and can fuse into patches, generally fading within a few days, but can recur. The rash is initially purple papules, above the skin surface, does not fade when pressed, and will turn dark red in a few days, and eventually fades to tan. 2, gastrointestinal symptoms: because of vascular inflammation causing edema, bleeding, necrosis, or perforation of the intestinal wall is the cause of intestinal symptoms and serious complications. It is usually characterized by paroxysmal severe abdominal pain, located around the umbilicus and lower abdomen, and may be accompanied by vomiting. Some children may have black stools or bloody stools, and occasionally intussusception, intestinal obstruction or intestinal perforation. 3.Joint symptoms: Some children may have painful swelling of the knee, ankle, elbow, wrist and other large joints, with limited movement. 4.Renal symptoms: The manifestation mostly occurs within one month of the onset of the disease, but also in the more advanced stage of the disease, a few can be nephritis as the starting manifestation. Most children show hematuria and proteinuria, accompanied by increased blood pressure and edema. 5, other manifestations: nosebleeds, gum bleeding, vomiting blood, etc. Very few can occur intracranial hemorrhage, pulmonary hemorrhage, etc. So many bleeding symptoms parents look pretty scary right! In fact, allergic purpura early diagnosis, according to medical advice medication prognosis is generally good. The parents need to pay attention to daily care and preventive measures to promote the child’s quick recovery and prevent recurrent attacks. The actual fact is that you can find a lot of people who are not able to get a good deal on a lot of things. During the acute phase of the disease, parents should let the child rest in bed and do less activity, because activity can accelerate blood circulation and aggravate bleeding. According to the doctor’s instructions, the diet should be light and easy to digest, and water should be fed appropriately, and the “tonic” diet should not be used to increase the gastrointestinal burden and aggravate the disease. 2. Prevention during the recovery period: Avoid contact with pathogens such as pollen, chemicals, paints, gasoline, allergic foods and drugs. Allergic children should not keep pets and minimize contact with animal fur. Pay attention to dietary hygiene, wash hands regularly, do not eat unclean fruits and vegetables and aquatic plants to eliminate the chance of intestinal parasitic infections. Strengthen exercise, enhance physical fitness, and improve the body’s resistance to various infections. Do not vaccinate your child before healing, but only after healing for 3-6 months, otherwise it may lead to the recurrence of the disease.