If it is just a common allergy, the face can heal itself without rubbing any substance, because the body has an automatic detoxification function, and during this period you only need to wash your face with warm water frequently. However, if the allergy is more serious, such as atopic dermatitis that does not heal by itself, there are more causes of this disease, such as contact with chemicals, soap detergents and inhalation of allergic substances that irritate and damage the protective layer of the skin, which can lead to atopic dermatitis. The causes of this disease are complex and recurring, so when you have atopic dermatitis, you need to actively search for the allergen and treat the cause. During the allergy period, patients need to actively look for allergens, avoid foods that cause allergies, such as seafood, avoid contact with pollen, and try to use clear, warm water when washing the face to keep it clean.