What causes urticaria in children?

Urticaria in children is mainly considered to be caused by allergies, such as food allergies, drug allergies, etc.; a small part is caused by infections, such as suppurative tonsillitis, enteritis, upper respiratory tract infection, pharyngitis, etc. Urticaria in children, the main treatment is drug treatment, children can take antihistamine treatment, such as loratadine, etc.