The main manifestations of allergy in children are as follows: 1, skin manifestations, the child will appear due to allergy skin hives, is a kind of rash with itching, through oral desensitization drugs, such as loratadine or diclofenac tadine can be effectively relieved. 2, allergy, the child will be accompanied by respiratory anomalies, coughing, wheezing, etc., through the nebulized inhalation or application of desensitization drugs, coughing symptoms can be effectively relieved. The symptoms of cough can be effectively relieved by nebulized inhalation or application of desensitizing drugs. 3, some children may have allergic gastrointestinal reactions, nausea, vomiting and diarrhea may occur, and there may be the formation of gastrointestinal hemorrhage and other phenomena, the formation of allergic purpura may be formed, in addition to hemorrhagic spots on the lower extremities, gastrointestinal hemorrhage, the child will have abdominal pain, as well as blood in the stools and other manifestations of the above are the common symptoms of allergy.