Red, swollen and itchy face may be caused by contact dermatitis, hives, eczema and other causes. 1. Contact dermatitis: red, swollen and itchy face may be caused by contact dermatitis. If the patient’s face comes into contact with certain allergic or irritating substances, such as cosmetics, pollen and so on. This will lead to a perverse reaction in the skin, and the common symptoms are redness, swelling and itching of the face. 2. Hives: red, swollen and itchy face may be caused by hives. Hives is a skin allergic reaction disease. Usually associated with insect bites, endocrine changes, hot and cold stimuli, drugs, etc. Patients will first appear itchy skin, followed by the appearance of the wind, a small number of patients have edematous erythema. The onset of time is uncertain, and no trace is left after subsiding. 3. Eczema: red, swollen and itchy face may also be caused by eczema. Eczema is a chronic inflammatory reaction of the skin, and a variety of internal and external factors related to stimulation, in addition to the obvious itching symptoms, but also with erythema, papules, peeling and so on. There are many causes of red, swollen and itchy face, and patients are advised to go to the hospital immediately and under the guidance of the doctor for reasonable treatment.