Itchy red patches on the face may be caused by contact dermatitis, eczema, tinea corporis, psoriasis and other causes. 1. Contact dermatitis: skin allergy due to contact with allergens, such as pollen, dust, mites, cosmetics and so on. It may appear as a red patch on the face with itchy symptoms. 2. Eczema: Inflammatory disease that occurs due to stimulation by a variety of internal and external factors, patients may have red spots on the face, pimples, itchy and other phenomena. 3. Ringworm: The skin on the face is infected by fungus, which leads to skin damage and triggers ringworm. Patients may have ring-shaped red spots, papules with scales, itching and other symptoms. 4. Psoriasis: a disease caused by genetic, immune, environmental and other factors, clinically mainly manifested as scaly red plaques, accompanied by itching, can also cause a piece of red spot on the face itchy situation. Itchy red patches on the face should be timely to the hospital, follow the doctor’s instructions for treatment, so as not to delay the condition.