Seafood allergy face redness, swelling and itching is a symptom of urticaria, it is recommended to detach from the allergen, give topical medication to apply, with oral medication, can help relieve the symptoms. 1. Get rid of allergens: allergy to seafood ingredients, dietary intake of fish, shrimp, crabs and other foods, may lead to skin allergies, redness, swelling, itching. Determined to be caused by seafood allergy, it is recommended not to ingest such foods to avoid further aggravation of symptoms. 2. Topical medication: Glycolite lotion can be used externally, and glucocorticosteroids such as Dinaid cream can be used externally if necessary to reduce the local inflammatory reaction. 3. Oral medication: Oral antihistamines, such as loratadine and olopatadine hydrochloride, can reduce the release of histamine from the skin and relieve itching. Eating seafood allergy face redness, swelling and itching, it is recommended to the hospital in time, under the guidance of the doctor for treatment, the drug should be used in accordance with the doctor’s instructions, do not self-medication.