Facial redness and allergies first need to remove allergens, followed by cold compresses, medication and other measures to alleviate allergy symptoms. 1. Remove allergens: accidentally eating or touching something by mistake may lead to allergies, it is recommended to start from the side of not commonly used, not often eat or new add something to exclude. 2. Cold compresses: local cold compresses, so that vasoconstriction, can effectively relieve the itching, redness, swelling and hot pain caused by edema. 3. Treatment with medication: topical calcium-modulated phosphatase inhibitors such as pimecrolimus ointment, tacrolimus ointment, combined with oral antihistamines such as loratadine, cetirizine and other drugs. Facial redness, swelling and allergies are recommended to consult a doctor in a timely manner, under the guidance of the physician reasonable treatment. The above drugs should be used in accordance with medical advice, do not self-medication, so as to avoid delaying the condition.