Allergic purpura requires a visit to the rheumatology and immunology department. It is common in children and adolescents. This condition cannot be cured and tends to recur frequently. The most common causes of allergic purpura include infections, medications, and food allergies, with infections being the most frequent cause, such as bacterial, viral, tuberculosis, and mycoplasma infections. Once allergic purpura occurs, it is necessary to conduct comprehensive tests to ascertain if there is damage to other organs or complications. If proteinuria occurs, aggressive treatment should be pursued, and a 24-hour urine protein quantification should be completed to determine the level of urinary protein. If necessary, a kidney biopsy may be performed to assess the extent of kidney damage. Bed rest is required until the proteinuria improves. (Medication use should be under the guidance of a doctor.)