Face allergy itchy bumps may be caused by contact dermatitis, eczema, hives and other diseases. 1. Contact dermatitis: If the skin of the face comes into contact with pollen, cosmetics and other exogenous substances, it may stimulate the skin to trigger an allergic reaction or irritation. Patients mainly show symptoms such as pimples and blisters, accompanied by itching. 2. Eczema: the cause of the disease is not clear, mostly related to genetic, immune abnormalities, endocrine and metabolic diseases and other factors. Patients will appear pimples, papules, intense itching and other symptoms. 3. Urticaria: the cause of the disease is mostly related to food, infection, respiratory tract inhalants, skin contacts and other factors. Patients mainly manifested as itchy skin, angioedema and other symptoms. There are many causes of allergic itchy bumps on the face, and it is recommended that patients go to the hospital to clarify the cause of the disease.