1. What is urticaria? Urticaria is a skin disease, also known as wheals, wheals, etc. It is characterized by red, swollen, itchy patches of skin, sometimes accompanied by blisters, edema and other symptoms. Urticaria can be caused by a variety of reasons, such as allergies, infections, autoimmunity, etc. 2. Common causes of urticaria in babies 1. Allergy: Babies may be allergic to certain foods, drugs or the environment, causing urticaria. 2. Viral infection: certain viruses