Itchy bumps on the face may be caused by allergic dermatitis, urticaria, eczema and so on. 1. Allergic dermatitis: facial contact with allergic substances can cause an allergic reaction of the skin, clinical manifestations of erythema, papules, pustules, cracks, etc., accompanied by varying degrees of itching. 2. Urticaria: the cause of urticaria is more complex, such as a variety of food, drugs or other factors can lead to stimulation of the skin mucosal vasodilatation, increased permeability, localized edema, the skin appeared in varying sizes of lumps of elevated, bright red or pale white, accompanied by obvious itching. 3. Eczema: a variety of internal and external factors can cause eczema, clinical manifestations of erythema on the basis of pinhead to corn size papules, blisters, accompanied by intense itching. Itchy bumps on the face may also have other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.