The first thing you should do is to quickly isolate the allergen and avoid re-exposure if you have red, swollen and itchy face allergies. Then you can rinse your face with plenty of cool water to relieve the redness and itchiness of your face. Also do a good job of sun protection to avoid ultraviolet stimulation, which can aggravate the symptoms of facial allergies. Patients with facial allergies can be quickly relieved by medication according to the symptoms, but they need to be used under the guidance of professional doctors. 1. antihistamines: clinically used chlorpheniramine maleate, loratadine, etc. can quickly relieve redness, swelling, itching and other allergy symptoms, and can be used together with calcium gluconate and vitamin C for more obvious effects. 2. hormone drugs: oral hormone drugs include Prednisone acetate tablets, methylprednisolone tablets, etc., local topical drugs such as hydrocortisone cream, mometasone furoate cream, etc., can quickly eliminate allergy symptoms. However, hormonal drugs should be used with caution as they may cause local skin pigmentation, enlarged pores, capillary dilation and other symptoms. In addition to medication, patients with facial allergy symptoms also need to change their daily habits. Avoid eating spicy and irritating foods, such as onion, ginger, garlic, chili, etc.; avoid eating greasy foods, such as fried foods, fatty meat, cakes, etc.; take a light diet to avoid aggravating the local skin inflammation caused by allergy. Wear a good hat and mask when you go out to reduce external stimulation. Develop good hygiene habits to ensure that the skin of the face is clean and dry.