Allergic purpura is a common vasculitic hypersensitivity response, which means that it is a vascular inflammatory response caused by allergies and is particularly prevalent among adolescents, with a higher occurrence in males. Most cases are associated with infections or allergies, with the most common infections being bacterial, viral, parasitic, and mycoplasmal. Seafood and high protein can lead to allergies, triggering allergic purpura. This condition cannot be cured and tends to recur, but as individuals age and their immune system strengthens, the frequency and likelihood of episodes significantly decrease. However, if kidney damage occurs, which means the development of allergic purpura nephritis, it is crucial to regularly monitor kidney function and urine routine to check for the presence of proteinuria. If necessary, cardiac puncture should be performed, and corticosteroids should be administered.