Summary of case history ,Patient Shang Moumou, male, 7 years old, came to the special needs clinic of the Affiliated Hospital of Chengdu University of Traditional Chinese Medicine on March 10, 2022 for "renal-type allergic purpura found for more than 3 months". The profile showed. The patient was clear and still in good spirits, with atrophy of both lower limbs, abdominal pain, and scattered new rashes on both lower limbs. Patient Shang, male, 7 years old, came to the special needs clinic of the Affiliated Hospital of Chengdu University of Traditional Chinese Medicine on March 10, 2022 for "renal-type allergic purpura found for more than 3 months". The patient's symptoms were Clear consciousness, fair spirit, atrophic complexion, abdominal pain, scattered new rash on both lower extremities, intermittent cough and sputum, aggravated cough at night, sputum in the throat, white sputum, sticky and not easily excreted. There was no shortness of breath, wheezing, no end-of-cough cockle-like coda, no barking cough and hoarseness, no abnormal crying, general sleep, urine regulation, 1-2 times/day, yellow-like, no pus or mucus, no significant weight loss recently.,TCM diagnosis, purpura-wind-heat with stasis evidence,Western medicine diagnosis ,Henoch-Schonlein purpura nephritis,Therapeutic methods ,Oral treatment with herbal prescriptions was given four times.,Clinical outcomes ,At the follow-up visit on April 14, 2022, urinalysis and urine sediment quantification did not show any abnormality, the child was advised to take Bailing tablets orally for consolidation, closely observe the basic condition of the child, strengthen nutrition, enhance physical fitness, and regulate mood. The child was advised to continue to take Bai Ling tablets to nourish the lung and kidney, and to benefit the essence.