Papular urticaria is common and presents as groups of very itchy papules. The papules may develop into small blisters. The itching results in scratching and keeps the child awake at night. It often recurs or may become chronic. Secondary infection causing impetigo is a common complication of scratching.

Papular urticaria is caused by an allergy to insect bites, especially fleas, mosquitoes and bed bugs. It is particularly common in young children.