Eyelid redness, swelling and itching can be caused by bacterial infections and can be treated with erythromycin ophthalmic ointment. Redness, swelling and itching of the eyelids can be caused by a variety of reasons, the most common of which are allergic reactions, bacterial infections caused by eye inflammation such as keratitis, blepharitis, etc. In addition, SLE and thyroid hormone abnormalities can also cause redness, swelling and itching of the eyelids. In addition, SLE and thyroid hormone abnormalities can also cause redness and swelling of the eyelids. When the patient’s eyelids are red, swollen and itchy, not all cases are suitable for the use of erythromycin eye ointment, only the inflammation caused by bacterial infection is effective. It is recommended that patients with red, swollen and itchy eyes should consult the hospital in time to assess their condition and follow the doctor’s instructions for treatment, and should not use erythromycin eye ointment blindly, so as not to miss their condition.