Red, swollen and itchy eyes are mostly caused by eye allergies, which can be treated by localized cold compresses and medication. 1. Physical therapy: the patient eyelids appear red, swollen, itchy and other symptoms, the patient can line eye local cold compress, relieve eye discomfort. 2. Drug therapy: patients with eye redness, swelling, itching and other discomfort symptoms, mainly caused by eye allergies, patients can follow the doctor’s instructions to use anti-allergy drugs, such as azelastine hydrochloride eye drops, sodium cromoglycate eye drops, and so on. If the patient’s allergic reaction is serious, the patient can follow the doctor’s instructions to take anti-allergy drug treatment, such as loratadine and so on. It is recommended that patients with obvious symptoms of eye redness, swelling, itching and other discomforts should consult a doctor in time to assess their condition and follow the doctor’s instructions for treatment.