IGHE and Henoch-Schoenlein purpura: Xue (11) and Zhao et al. (12) analyzed the serum specific IgE and IgG of nearly 100 children with allergic purpura, and found that food sIgG, food allergen sIgE, inhalant allergens sIgE and tIgE were closely related to the development of the disease in the children, and concluded that avoiding contact with allergens in the clinic could play a therapeutic and preventive role in the disease.