It is not advisable to use saline to cleanse the skin of the face when it is allergic, otherwise it may stimulate the aggravation of the allergic symptoms. When facial skin allergy occurs, if the redness and oozing are obvious, it is not recommended to wash it, this time you can use external saline for local wet compresses. Do not touch raw water, avoid hot and cold stimulation, timely oral antihistamine treatment, when the redness, swelling, exudation relief and then wash with normal water can be, must not use alkaline detergent for cleaning, otherwise it will stimulate the skin, destroy the skin surface acidity. People with facial allergies should not use vinegar, alcohol, salt water or other homemade solutions for cleaning, as these solutions may cause the aggravation of allergy symptoms.