Sudden, particularly itchy and puffy eyelids are usually due to allergic blepharitis. Allergic blepharitis occurs in relation to the patient’s eye skin coming into contact with allergens. The more common allergens in life are cosmetics, skin care products, hair dyes, cotton wool, willow floss, poplar floss, pollen and so on. For treatment, patients must not rub their eyes, otherwise it will lead to edema and itching symptoms aggravate, you can use water to wash the face, rinse off the allergens attached to the skin of the eyes, you can terminate the allergic reaction, but also in the eyelid area to apply hormone ophthalmic ointment treatment, such as tobramycin dexamethasone ophthalmic ointment, etc., which can play the role of anti-allergy, quickly eliminate the symptoms of itching and edema. The patient should consult a doctor to determine the specific cause.