Firstly, allergic purpura is commonly found in adolescents and children, with children being the most commonly affected, particularly between the ages of 8 to 15. It typically occurs during the spring and autumn seasons. The most common clinical manifestations are bleeding spots on the lower limbs, hematuria, black stools, and joint pain, which are the most typical clinical presentations. If there are only bleeding spots on the skin, no special treatment is required at this time; rest in bed is necessary, and these bruises can be absorbed. Once the kidneys are involved, it indicates a relatively severe condition, and at this time, active and standard treatment is necessary, including the need to improve routine urine and kidney function indicators. If protein quantification is relatively high, then glucocorticoids are needed, combined with anti-allergic medication. (Medication should be taken under the guidance of a doctor.)