Papular acrodermatitis of childhood (PAC), also known as Gianotti–Crosti syndrome (GCS), is a unique cutaneous disorder characterized by the abrupt onset of an erythematous papular exanthem ...

The main symptom is a skin rash ... Papular urticaria is a hypersensitivity to insect bites, often from mosquitoes, bedbugs, fleas, or mites. It’s especially common in toddlers and young children.