Allergic purpura occurs in children and adolescents and is more common in children up to 10 years of age, male for female. It occurs in the lower extremities, on the extensor side of the calf, and in severe cases, it can spread to the upper extremities and the drive shaft. The onset of the disease is often preceded by a respiratory infection and a low-grade fever, followed by a purplish papule, which usually develops to the size of a pinpoint to a soybean within 24 hours and can be palpable. Some purpura have a tendency to fuse and the duration of the disease varies, lasting several months or 1 to 2 years, with a tendency to recur.