Medical history Abstract,　 Child: Du Mou, 6 years old. The main cause was "intermittent double lower limb rash for more than 2 months". From January to May 2022, the child experienced several abdominal pain and joint pain, accompanied by repeated rash. Traditional Chinese medicine diagnosis: pediatric purpura, blood fever syndrome; Western medicine diagnosis: allergic purpura. After the intervention of traditional Chinese medicine and non-drug means, the child's abdominal pain and joint pain did not recur, and no hematuria or proteinuria since the follow-up to the onset of nearly half a year. Traditional Chinese medicine diagnosis of children with purpura, blood fever syndrome. Western medicine diagnosis of allergic purpura. Interventions: TCM intervention, non-drug therapy. The abdominal pain and joint pain did not recur, and no hematuria or proteinuria since the follow-up to nearly half a year of the onset. Pediatric specialty suitable for reading; Blood; kidney disease