Pediatric secondary thrombocytopenic purpura is commonly manifested as skin hemorrhagic spots or petechiae ecchymosis, and children with severe conditions may have joint cavity bleeding, organ bleeding (such as gastrointestinal bleeding, urinary tract bleeding, etc.), intracranial hemorrhage and other manifestations. Pediatric secondary thrombocytopenic purpura is a disease often secondary to upper respiratory tract infections, blood routine manifestations of platelet count is severely reduced, which leads to spontaneous bleeding manifestations of the skin and mucous membranes, the condition of the milder patients may be manifested as skin bleeding spots, purpura, petechiae or ecchymosis, etc., and some patients may be manifested as the oral and nasal mucous membranes bleeding spots, blood vesicles and other manifestations. In some patients, the platelet count is severely reduced, and serious bleeding complications may occur, such as bleeding in the joint cavity, gastrointestinal bleeding, urinary tract bleeding, intracranial hemorrhage, etc., which may endanger the child’s life in severe cases. It is recommended that children should consult the Pediatric Hematology Department in a timely manner, and most of them can be completely cured after being evaluated by a specialist.