Allergic purpura is an inflammatory disease of small blood vessels, mainly affecting the skin or digestive tract, joint areas and kidney capillaries, mainly related to elevated levels of IgA in the blood, and requires more tests at the time of review. It is necessary to check the blood routine, whether the platelet count is normal to exclude thrombocytopenic purpura, whether the white blood cell and neutrophil values are elevated, and whether bacterial infection may cause allergic purpura. On review IgA immune complexes in the serum will be elevated, capillary fragility test is positive, anti-O as well as blood sedimentation can be checked, both of which may be elevated. The acute phase of allergic purpura needs to be rechecked for C3 or C4 levels, both of which may be decreased. Urine routine as well as urine microprotein needs to be checked to see if allergic purpura has an effect on the kidneys.